Do not use deprecated EBook/ECal API

24 files changed, 606 insertions, 615 deletions

diff --git a/modules/calendar/e-cal-attachment-handler.c b/modules/calendar/e-cal-attachment-handler.c
index c1b03874ff..a2932a0d17 100644
--- a/modules/calendar/e-cal-attachment-handler.c
+++ b/modules/calendar/e-cal-attachment-handler.c
@@ -27,11 +27,10 @@
 
 #include <glib/gi18n.h>
 #include <libical/ical.h>
-#include <libecal/e-cal.h>
+#include <libecal/e-cal-client.h>
 #include <camel/camel.h>
 #include <libedataserverui/e-source-selector.h>
-
-#include "calendar/common/authentication.h"
+#include <libedataserverui/e-client-utils.h>
 
 typedef struct _ImportContext ImportContext;
 
@@ -40,9 +39,9 @@ struct _ECalAttachmentHandlerPrivate {
 };
 
 struct _ImportContext {
-	ECal *client;
+	ECalClient *client;
 	icalcomponent *component;
-	ECalSourceType source_type;
+	ECalClientSourceType source_type;
 };
 
 static gpointer parent_class;
@@ -110,12 +109,13 @@ attachment_handler_get_component (EAttachment *attachment)
 }
 
 static gboolean
-attachment_handler_update_objects (ECal *client,
+attachment_handler_update_objects (ECalClient *client,
                                    icalcomponent *component)
 {
 	icalcomponent_kind kind;
 	icalcomponent *vcalendar;
 	gboolean success;
+	GError *error = NULL;
 
 	kind = icalcomponent_isa (component);
 
@@ -141,7 +141,10 @@ attachment_handler_update_objects (ECal *client,
 			return FALSE;
 	}
 
-	success = e_cal_receive_objects (client, vcalendar, NULL);
+	success = e_cal_client_receive_objects_sync (client, vcalendar, NULL, &error);
+	if (error)
+		g_debug ("%s: Failed to receive objects: %s", G_STRFUNC, error ? error->message : "Unknown error");
+	g_clear_error (&error);
 
 	icalcomponent_free (vcalendar);
 
@@ -149,16 +152,23 @@ attachment_handler_update_objects (ECal *client,
 }
 
 static void
-attachment_handler_import_event (ECal *client,
-                                 const GError *error,
-                                 EAttachment *attachment)
+attachment_handler_import_event (GObject *source_object, GAsyncResult *result, gpointer user_data)
 {
+	EAttachment *attachment = user_data;
+	EClient *client = NULL;
+	GError *error = NULL;
 	icalcomponent *component;
 	icalcomponent *subcomponent;
 	icalcompiter iter;
 
-	/* FIXME Notify the user somehow. */
-	g_return_if_fail (error == NULL);
+	if (!e_client_utils_open_new_finish (E_SOURCE (source_object), result, &client, &error))
+		client = NULL;
+
+	if (!client) {
+		g_debug ("%s: Failed to open '%s': %s", G_STRFUNC, e_source_peek_name (E_SOURCE (source_object)), error ? error->message : "Unknown error");
+		g_object_unref (attachment);
+		return;
+	}
 
 	component = attachment_handler_get_component (attachment);
 	g_return_if_fail (component != NULL);
@@ -182,23 +192,30 @@ attachment_handler_import_event (ECal *client,
 	}
 
 	/* XXX Do something with the return value. */
-	attachment_handler_update_objects (client, component);
+	attachment_handler_update_objects (E_CAL_CLIENT (client), component);
 
 	g_object_unref (attachment);
 	g_object_unref (client);
 }
 
 static void
-attachment_handler_import_todo (ECal *client,
-                                const GError *error,
-                                EAttachment *attachment)
+attachment_handler_import_todo (GObject *source_object, GAsyncResult *result, gpointer user_data)
 {
+	EAttachment *attachment = user_data;
+	EClient *client = NULL;
+	GError *error = NULL;
 	icalcomponent *component;
 	icalcomponent *subcomponent;
 	icalcompiter iter;
 
-	/* FIXME Notify the user somehow. */
-	g_return_if_fail (error == NULL);
+	if (!e_client_utils_open_new_finish (E_SOURCE (source_object), result, &client, &error))
+		client = NULL;
+
+	if (!client) {
+		g_debug ("%s: Failed to open '%s': %s", G_STRFUNC, e_source_peek_name (E_SOURCE (source_object)), error ? error->message : "Unknown error");
+		g_object_unref (attachment);
+		return;
+	}
 
 	component = attachment_handler_get_component (attachment);
 	g_return_if_fail (component != NULL);
@@ -222,7 +239,7 @@ attachment_handler_import_todo (ECal *client,
 	}
 
 	/* XXX Do something with the return value. */
-	attachment_handler_update_objects (client, component);
+	attachment_handler_update_objects (E_CAL_CLIENT (client), component);
 
 	g_object_unref (attachment);
 	g_object_unref (client);
@@ -237,27 +254,25 @@ attachment_handler_row_activated_cb (GtkDialog *dialog)
 static void
 attachment_handler_run_dialog (GtkWindow *parent,
                                EAttachment *attachment,
-                               ECalSourceType source_type,
+                               ECalClientSourceType source_type,
                                const gchar *title)
 {
 	GtkWidget *dialog;
 	GtkWidget *container;
 	GtkWidget *widget;
-	GCallback callback;
 	ESourceSelector *selector;
 	ESourceList *source_list;
 	ESource *source;
-	ECal *client;
 	icalcomponent *component;
 	GError *error = NULL;
 
 	component = attachment_handler_get_component (attachment);
 	g_return_if_fail (component != NULL);
 
-	e_cal_get_sources (&source_list, source_type, &error);
+	e_cal_client_get_sources (&source_list, source_type, &error);
 	if (error != NULL) {
-		g_warning ("%s", error->message);
-		g_error_free (error);
+		g_debug ("%s: Faield to get cal sources: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		return;
 	}
 
@@ -309,22 +324,22 @@ attachment_handler_run_dialog (GtkWindow *parent,
 	if (source == NULL)
 		goto exit;
 
-	client = e_auth_new_cal_from_source (source, source_type);
-	if (client == NULL)
-		goto exit;
-
-	if (source_type == E_CAL_SOURCE_TYPE_EVENT)
-		callback = G_CALLBACK (attachment_handler_import_event);
-	else if (source_type == E_CAL_SOURCE_TYPE_TODO)
-		callback = G_CALLBACK (attachment_handler_import_todo);
-	else
-		goto exit;
-
-	g_object_ref (attachment);
-	g_signal_connect (client, "cal-opened-ex", callback, attachment);
-	e_cal_open_async (client, FALSE);
+	switch (source_type) {
+	case E_CAL_CLIENT_SOURCE_TYPE_EVENTS:
+		e_client_utils_open_new (source, E_CLIENT_SOURCE_TYPE_EVENTS, FALSE, NULL,
+			e_client_utils_authenticate_handler, NULL,
+			attachment_handler_import_event, g_object_ref (attachment));
+		break;
+	case E_CAL_CLIENT_SOURCE_TYPE_TASKS:
+		e_client_utils_open_new (source, E_CLIENT_SOURCE_TYPE_TASKS, FALSE, NULL,
+			e_client_utils_authenticate_handler, NULL,
+			attachment_handler_import_todo, g_object_ref (attachment));
+		break;
+	default:
+		break;
+	}
 
-exit:
+ exit:
 	gtk_widget_destroy (dialog);
 }
 
@@ -348,7 +363,7 @@ attachment_handler_import_to_calendar (GtkAction *action,
 
 	attachment_handler_run_dialog (
 		parent, attachment,
-		E_CAL_SOURCE_TYPE_EVENT,
+		E_CAL_CLIENT_SOURCE_TYPE_EVENTS,
 		_("Select a Calendar"));
 
 	g_object_unref (attachment);
@@ -375,7 +390,7 @@ attachment_handler_import_to_tasks (GtkAction *action,
 
 	attachment_handler_run_dialog (
 		parent, attachment,
-		E_CAL_SOURCE_TYPE_TODO,
+		E_CAL_CLIENT_SOURCE_TYPE_TASKS,
 		_("Select a Task List"));
 
 	g_object_unref (attachment);
diff --git a/modules/calendar/e-cal-shell-backend.c b/modules/calendar/e-cal-shell-backend.c
index 51ed54b810..8d0c6ef36a 100644
--- a/modules/calendar/e-cal-shell-backend.c
+++ b/modules/calendar/e-cal-shell-backend.c
@@ -27,11 +27,12 @@
 
 #include <string.h>
 #include <glib/gi18n.h>
-#include <libecal/e-cal.h>
+#include <libecal/e-cal-client.h>
 #include <libecal/e-cal-time-util.h>
 #include <libedataserver/e-url.h>
 #include <libedataserver/e-source.h>
 #include <libedataserver/e-source-group.h>
+#include <libedataserverui/e-client-utils.h>
 
 #include "e-util/e-import.h"
 #include "shell/e-shell.h"
@@ -39,7 +40,6 @@
 #include "shell/e-shell-window.h"
 #include "widgets/misc/e-preferences-window.h"
 
-#include "calendar/common/authentication.h"
 #include "calendar/gui/comp-util.h"
 #include "calendar/gui/dialogs/calendar-setup.h"
 #include "calendar/gui/dialogs/event-editor.h"
@@ -85,6 +85,7 @@ cal_shell_backend_ensure_sources (EShellBackend *shell_backend)
 	const gchar *name;
 	gchar *property;
 	gboolean save_list = FALSE;
+	GError *error = NULL;
 
 	birthdays = NULL;
 	personal = NULL;
@@ -94,10 +95,11 @@ cal_shell_backend_ensure_sources (EShellBackend *shell_backend)
 	shell = e_shell_backend_get_shell (shell_backend);
 	shell_settings = e_shell_get_shell_settings (shell);
 
-	if (!e_cal_get_sources (
+	if (!e_cal_client_get_sources (
 		&cal_shell_backend->priv->source_list,
-		E_CAL_SOURCE_TYPE_EVENT, NULL)) {
-		g_warning ("Could not get calendar sources from GConf!");
+		E_CAL_CLIENT_SOURCE_TYPE_EVENTS, &error)) {
+		g_debug ("%s: Could not get calendar sources: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		return;
 	}
 
@@ -234,20 +236,31 @@ cal_shell_backend_new_event (ESource *source,
                              CompEditorFlags flags,
                              gboolean all_day)
 {
-	ECal *cal;
+	EClient *client = NULL;
+	ECalClient *cal_client;
 	ECalComponent *comp;
 	EShellSettings *shell_settings;
 	CompEditor *editor;
+	GError *error = NULL;
 
 	/* XXX Handle errors better. */
-	cal = e_load_cal_source_finish (source, result, NULL);
-	g_return_if_fail (E_IS_CAL (cal));
+	if (!e_client_utils_open_new_finish (source, result, &client, &error))
+		client = NULL;
+
+	if (!client) {
+		g_debug ("%s: Failed to open '%s': %s", G_STRFUNC, e_source_peek_name (source), error ? error->message : "Unknown error");
+		g_clear_error (&error);
+		return;
+	}
+
+	g_return_if_fail (E_IS_CAL_CLIENT (client));
 
+	cal_client = E_CAL_CLIENT (client);
 	shell_settings = e_shell_get_shell_settings (shell);
 
-	editor = event_editor_new (cal, shell, flags);
+	editor = event_editor_new (cal_client, shell, flags);
 	comp = cal_comp_event_new_with_current_time (
-		cal, all_day,
+		cal_client, all_day,
 		e_shell_settings_get_pointer (
 			shell_settings, "cal-timezone"),
 		e_shell_settings_get_boolean (
@@ -262,13 +275,11 @@ cal_shell_backend_new_event (ESource *source,
 	gtk_window_present (GTK_WINDOW (editor));
 
 	g_object_unref (comp);
-	g_object_unref (cal);
+	g_object_unref (client);
 }
 
 static void
-cal_shell_backend_event_new_cb (ESource *source,
-                                GAsyncResult *result,
-                                EShell *shell)
+cal_shell_backend_event_new_cb (GObject *source_object, GAsyncResult *result, gpointer shell)
 {
 	CompEditorFlags flags = 0;
 	gboolean all_day = FALSE;
@@ -276,15 +287,13 @@ cal_shell_backend_event_new_cb (ESource *source,
 	flags |= COMP_EDITOR_NEW_ITEM;
 	flags |= COMP_EDITOR_USER_ORG;
 
-	cal_shell_backend_new_event (source, result, shell, flags, all_day);
+	cal_shell_backend_new_event (E_SOURCE (source_object), result, shell, flags, all_day);
 
 	g_object_unref (shell);
 }
 
 static void
-cal_shell_backend_event_all_day_new_cb (ESource *source,
-                                        GAsyncResult *result,
-                                        EShell *shell)
+cal_shell_backend_event_all_day_new_cb (GObject *source_object, GAsyncResult *result, gpointer shell)
 {
 	CompEditorFlags flags = 0;
 	gboolean all_day = TRUE;
@@ -292,15 +301,13 @@ cal_shell_backend_event_all_day_new_cb (ESource *source,
 	flags |= COMP_EDITOR_NEW_ITEM;
 	flags |= COMP_EDITOR_USER_ORG;
 
-	cal_shell_backend_new_event (source, result, shell, flags, all_day);
+	cal_shell_backend_new_event (E_SOURCE (source_object), result, shell, flags, all_day);
 
 	g_object_unref (shell);
 }
 
 static void
-cal_shell_backend_event_meeting_new_cb (ESource *source,
-                                        GAsyncResult *result,
-                                        EShell *shell)
+cal_shell_backend_event_meeting_new_cb (GObject *source_object, GAsyncResult *result, gpointer shell)
 {
 	CompEditorFlags flags = 0;
 	gboolean all_day = FALSE;
@@ -309,7 +316,7 @@ cal_shell_backend_event_meeting_new_cb (ESource *source,
 	flags |= COMP_EDITOR_USER_ORG;
 	flags |= COMP_EDITOR_MEETING;
 
-	cal_shell_backend_new_event (source, result, shell, flags, all_day);
+	cal_shell_backend_new_event (E_SOURCE (source_object), result, shell, flags, all_day);
 
 	g_object_unref (shell);
 }
@@ -324,7 +331,7 @@ action_event_new_cb (GtkAction *action,
 	EShellSettings *shell_settings;
 	ESource *source = NULL;
 	ESourceList *source_list;
-	ECalSourceType source_type;
+	EClientSourceType source_type;
 	const gchar *action_name;
 	gchar *uid;
 
@@ -361,7 +368,7 @@ action_event_new_cb (GtkAction *action,
 
 	/* This callback is used for both appointments and meetings. */
 
-	source_type = E_CAL_SOURCE_TYPE_EVENT;
+	source_type = E_CLIENT_SOURCE_TYPE_EVENTS;
 
 	shell = e_shell_window_get_shell (shell_window);
 	shell_settings = e_shell_get_shell_settings (shell);
@@ -387,26 +394,17 @@ action_event_new_cb (GtkAction *action,
 	 * FIXME Need to obtain a better default time zone. */
 	action_name = gtk_action_get_name (action);
 	if (strcmp (action_name, "event-all-day-new") == 0)
-		e_load_cal_source_async (
-			source, source_type, NULL,
-			GTK_WINDOW (shell_window),
-			NULL, (GAsyncReadyCallback)
-			cal_shell_backend_event_all_day_new_cb,
-			g_object_ref (shell));
+		e_client_utils_open_new (source, source_type, FALSE, NULL,
+			e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+			cal_shell_backend_event_all_day_new_cb, g_object_ref (shell));
 	else if (strcmp (action_name, "event-meeting-new") == 0)
-		e_load_cal_source_async (
-			source, source_type, NULL,
-			GTK_WINDOW (shell_window),
-			NULL, (GAsyncReadyCallback)
-			cal_shell_backend_event_meeting_new_cb,
-			g_object_ref (shell));
+		e_client_utils_open_new (source, source_type, FALSE, NULL,
+			e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+			cal_shell_backend_event_meeting_new_cb, g_object_ref (shell));
 	else
-		e_load_cal_source_async (
-			source, source_type, NULL,
-			GTK_WINDOW (shell_window),
-			NULL, (GAsyncReadyCallback)
-			cal_shell_backend_event_new_cb,
-			g_object_ref (shell));
+		e_client_utils_open_new (source, source_type, FALSE, NULL,
+			e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+			cal_shell_backend_event_new_cb, g_object_ref (shell));
 
 	g_object_unref (source_list);
 }
@@ -489,11 +487,11 @@ cal_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	EShellSettings *shell_settings;
 	CompEditor *editor;
 	CompEditorFlags flags = 0;
-	ECal *client;
+	ECalClient *client;
 	ECalComponent *comp;
 	ESource *source;
 	ESourceList *source_list;
-	ECalSourceType source_type;
+	ECalClientSourceType source_type;
 	EUri *euri;
 	icalcomponent *icalcomp;
 	icalproperty *icalprop;
@@ -507,7 +505,7 @@ cal_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	gboolean handled = FALSE;
 	GError *error = NULL;
 
-	source_type = E_CAL_SOURCE_TYPE_EVENT;
+	source_type = E_CAL_CLIENT_SOURCE_TYPE_EVENTS;
 	shell = e_shell_backend_get_shell (shell_backend);
 	shell_settings = e_shell_get_shell_settings (shell);
 
@@ -589,24 +587,23 @@ cal_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	 * we successfully open it is another matter... */
 	handled = TRUE;
 
-	if (!e_cal_get_sources (&source_list, source_type, NULL)) {
-		g_printerr ("Could not get calendar sources from GConf!\n");
+	if (!e_cal_client_get_sources (&source_list, source_type, &error)) {
+		g_debug ("%s: Could not get calendar sources: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		goto exit;
 	}
 
 	source = e_source_list_peek_source_by_uid (source_list, source_uid);
 	if (source == NULL) {
-		g_printerr ("No source for UID '%s'\n", source_uid);
+		g_debug ("%s: No source for UID '%s'", G_STRFUNC, source_uid);
 		g_object_unref (source_list);
 		goto exit;
 	}
 
-	client = e_auth_new_cal_from_source (source, source_type);
-	if (client == NULL || !e_cal_open (client, TRUE, &error)) {
-		if (error != NULL) {
-			g_printerr ("%s\n", error->message);
-			g_error_free (error);
-		}
+	client = e_cal_client_new (source, source_type, &error);
+	if (client == NULL || !e_client_open_sync (E_CLIENT (client), TRUE, NULL, &error)) {
+		g_debug ("%s: Failed to create/open client '%s': %s", G_STRFUNC, e_source_peek_name (source), error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		g_object_unref (source_list);
 		goto exit;
 	}
@@ -619,10 +616,10 @@ cal_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	if (editor != NULL)
 		goto present;
 
-	if (!e_cal_get_object (client, comp_uid, comp_rid, &icalcomp, &error)) {
-		g_printerr ("%s\n", error->message);
+	if (!e_cal_client_get_object_sync (client, comp_uid, comp_rid, &icalcomp, NULL, &error)) {
+		g_debug ("%s: Failed to get object from client: %s", G_STRFUNC, error ? error->message : "Unknown error");
 		g_object_unref (source_list);
-		g_error_free (error);
+		g_clear_error (&error);
 		goto exit;
 	}
 
diff --git a/modules/calendar/e-cal-shell-sidebar.c b/modules/calendar/e-cal-shell-sidebar.c
index d49b143eef..8e3010ddb7 100644
--- a/modules/calendar/e-cal-shell-sidebar.c
+++ b/modules/calendar/e-cal-shell-sidebar.c
@@ -27,12 +27,12 @@
 
 #include <string.h>
 #include <glib/gi18n.h>
+#include <libedataserverui/e-client-utils.h>
 
 #include "e-util/e-alert-dialog.h"
 #include "e-util/gconf-bridge.h"
 #include "widgets/misc/e-paned.h"
 
-#include "calendar/common/authentication.h"
 #include "calendar/gui/e-calendar-selector.h"
 #include "calendar/gui/misc.h"
 #include "calendar/gui/dialogs/calendar-setup.h"
@@ -56,7 +56,7 @@ struct _ECalShellSidebarPrivate {
 	 * opened.  So the user first highlights a source, then
 	 * sometime later we update our default-client property
 	 * which is bound by an EBinding to ECalModel. */
-	ECal *default_client;
+	ECalClient *default_client;
 
 	GCancellable *loading_default_client;
 };
@@ -81,7 +81,7 @@ static GType cal_shell_sidebar_type;
 
 static void
 cal_shell_sidebar_emit_client_added (ECalShellSidebar *cal_shell_sidebar,
-                                     ECal *client)
+                                     ECalClient *client)
 {
 	guint signal_id = signals[CLIENT_ADDED];
 
@@ -90,7 +90,7 @@ cal_shell_sidebar_emit_client_added (ECalShellSidebar *cal_shell_sidebar,
 
 static void
 cal_shell_sidebar_emit_client_removed (ECalShellSidebar *cal_shell_sidebar,
-                                       ECal *client)
+                                       ECalClient *client)
 {
 	guint signal_id = signals[CLIENT_REMOVED];
 
@@ -108,7 +108,7 @@ cal_shell_sidebar_emit_status_message (ECalShellSidebar *cal_shell_sidebar,
 
 static void
 cal_shell_sidebar_backend_died_cb (ECalShellSidebar *cal_shell_sidebar,
-                                   ECal *client)
+                                   ECalClient *client)
 {
 	EShellView *shell_view;
 	EShellContent *shell_content;
@@ -123,7 +123,7 @@ cal_shell_sidebar_backend_died_cb (ECalShellSidebar *cal_shell_sidebar,
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
 
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 	uid = e_source_peek_uid (source);
 
 	g_object_ref (source);
@@ -141,7 +141,7 @@ cal_shell_sidebar_backend_died_cb (ECalShellSidebar *cal_shell_sidebar,
 static void
 cal_shell_sidebar_backend_error_cb (ECalShellSidebar *cal_shell_sidebar,
                                     const gchar *message,
-                                    ECal *client)
+                                    ECalClient *client)
 {
 	EShellView *shell_view;
 	EShellContent *shell_content;
@@ -153,7 +153,7 @@ cal_shell_sidebar_backend_error_cb (ECalShellSidebar *cal_shell_sidebar,
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
 
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 	source_group = e_source_peek_group (source);
 
 	e_alert_submit (
@@ -164,38 +164,43 @@ cal_shell_sidebar_backend_error_cb (ECalShellSidebar *cal_shell_sidebar,
 }
 
 static void
-cal_shell_sidebar_client_opened_cb (ECalShellSidebar *cal_shell_sidebar,
-                                    const GError *error,
-                                    ECal *client)
+cal_shell_sidebar_client_opened_cb (GObject *source_object, GAsyncResult *result, gpointer user_data)
 {
+	ECalClient *client = E_CAL_CLIENT (source_object);
+	ECalShellSidebar *cal_shell_sidebar = user_data;
 	EShellView *shell_view;
 	EShellContent *shell_content;
 	EShellSidebar *shell_sidebar;
 	const gchar *message;
+	GError *error = NULL;
 
 	shell_sidebar = E_SHELL_SIDEBAR (cal_shell_sidebar);
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
 
-	if (g_error_matches (error, E_CALENDAR_ERROR,
-		E_CALENDAR_STATUS_AUTHENTICATION_FAILED) ||
-	    g_error_matches (error, E_CALENDAR_ERROR,
-		E_CALENDAR_STATUS_AUTHENTICATION_REQUIRED))
-		e_auth_cal_forget_password (client);
+	e_client_open_finish (E_CLIENT (client), result, &error);
+
+	if (g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_AUTHENTICATION_FAILED) ||
+	    g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_AUTHENTICATION_REQUIRED))
+		e_client_utils_forget_password (E_CLIENT (client));
+
+	if (g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_AUTHENTICATION_FAILED)) {
+		e_client_open (E_CLIENT (client), FALSE, NULL, cal_shell_sidebar_client_opened_cb, user_data);
+		g_clear_error (&error);
+		return;
+	}
 
 	/* Handle errors. */
-	switch (error ? error->code : E_CALENDAR_STATUS_OK) {
-		case E_CALENDAR_STATUS_OK:
+	switch ((error && error->domain == E_CLIENT_ERROR) ? error->code : -1) {
+		case -1:
 			break;
 
-		case E_CALENDAR_STATUS_AUTHENTICATION_FAILED:
-			e_cal_open_async (client, FALSE);
-			return;
-
-		case E_CALENDAR_STATUS_BUSY:
+		case E_CLIENT_ERROR_BUSY:
+			g_debug ("%s: Cannot open '%s', it's busy (%s)", G_STRFUNC, e_source_peek_name (e_client_get_source (E_CLIENT (client))), error->message);
+			g_clear_error (&error);
 			return;
 
-		case E_CALENDAR_STATUS_REPOSITORY_OFFLINE:
+		case E_CLIENT_ERROR_REPOSITORY_OFFLINE:
 			e_alert_submit (
 				E_ALERT_SINK (shell_content),
 				"calendar:prompt-no-contents-offline-calendar",
@@ -203,7 +208,7 @@ cal_shell_sidebar_client_opened_cb (ECalShellSidebar *cal_shell_sidebar,
 			/* fall through */
 
 		default:
-			if (error->code != E_CALENDAR_STATUS_REPOSITORY_OFFLINE) {
+			if (error->code != E_CLIENT_ERROR_REPOSITORY_OFFLINE) {
 				e_alert_submit (
 					E_ALERT_SINK (shell_content),
 					"calendar:failed-open-calendar",
@@ -212,15 +217,12 @@ cal_shell_sidebar_client_opened_cb (ECalShellSidebar *cal_shell_sidebar,
 
 			e_cal_shell_sidebar_remove_source (
 				cal_shell_sidebar,
-				e_cal_get_source (client));
+				e_client_get_source (E_CLIENT (client)));
+			g_clear_error (&error);
 			return;
 	}
 
-	g_assert (error == NULL);
-
-	g_signal_handlers_disconnect_matched (
-		client, G_SIGNAL_MATCH_FUNC, 0, 0, NULL,
-		cal_shell_sidebar_client_opened_cb, NULL);
+	g_clear_error (&error);
 
 	message = _("Loading calendars");
 	cal_shell_sidebar_emit_status_message (cal_shell_sidebar, message);
@@ -229,27 +231,31 @@ cal_shell_sidebar_client_opened_cb (ECalShellSidebar *cal_shell_sidebar,
 }
 
 static void
-cal_shell_sidebar_default_loaded_cb (ESource *source,
-                                     GAsyncResult *result,
-                                     EShellSidebar *shell_sidebar)
+cal_shell_sidebar_default_loaded_cb (GObject *source_object, GAsyncResult *result, gpointer user_data)
 {
+	EShellSidebar *shell_sidebar = user_data;
 	ECalShellSidebarPrivate *priv;
 	EShellContent *shell_content;
 	EShellView *shell_view;
-	ECal *client;
+	ECalShellContent *cal_shell_content;
+	ECalModel *model;
+	EClient *client = NULL;
 	GError *error = NULL;
 
 	priv = E_CAL_SHELL_SIDEBAR (shell_sidebar)->priv;
 
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
+	cal_shell_content = E_CAL_SHELL_CONTENT (shell_content);
+	model = e_cal_shell_content_get_model (cal_shell_content);
 
-	client = e_load_cal_source_finish (source, result, &error);
+	if (!e_client_utils_open_new_finish (E_SOURCE (source_object), result, &client, &error))
+		client = NULL;
 
-	if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
+	if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED) ||
+	    g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_CANCELLED)) {
 		g_error_free (error);
 		goto exit;
-
 	} else if (error != NULL) {
 		e_alert_submit (
 			E_ALERT_SINK (shell_content),
@@ -259,16 +265,18 @@ cal_shell_sidebar_default_loaded_cb (ESource *source,
 		goto exit;
 	}
 
-	g_return_if_fail (E_IS_CAL (client));
+	g_return_if_fail (E_IS_CAL_CLIENT (client));
 
 	if (priv->default_client != NULL)
 		g_object_unref (priv->default_client);
 
-	priv->default_client = client;
+	priv->default_client = E_CAL_CLIENT (client);
+
+	e_cal_client_set_default_timezone (priv->default_client, e_cal_model_get_timezone (model));
 
 	g_object_notify (G_OBJECT (shell_sidebar), "default-client");
 
-exit:
+ exit:
 	g_object_unref (shell_sidebar);
 }
 
@@ -279,29 +287,18 @@ cal_shell_sidebar_set_default (ECalShellSidebar *cal_shell_sidebar,
 	ECalShellSidebarPrivate *priv;
 	EShellView *shell_view;
 	EShellWindow *shell_window;
-	EShellContent *shell_content;
 	EShellSidebar *shell_sidebar;
-	ECalShellContent *cal_shell_content;
-	ECalSourceType source_type;
-	ECalModel *model;
-	ECal *client;
-	icaltimezone *timezone;
+	ECalClient *client;
 	const gchar *uid;
 
 	priv = cal_shell_sidebar->priv;
-	source_type = E_CAL_SOURCE_TYPE_EVENT;
 
 	/* FIXME Sidebar should not be accessing the EShellContent.
 	 *       This probably needs to be moved to ECalShellView. */
 	shell_sidebar = E_SHELL_SIDEBAR (cal_shell_sidebar);
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
-	shell_content = e_shell_view_get_shell_content (shell_view);
 	shell_window = e_shell_view_get_shell_window (shell_view);
 
-	cal_shell_content = E_CAL_SHELL_CONTENT (shell_content);
-	model = e_cal_shell_content_get_model (cal_shell_content);
-	timezone = e_cal_model_get_timezone (model);
-
 	/* Cancel any unfinished previous request. */
 	if (priv->loading_default_client != NULL) {
 		g_cancellable_cancel (priv->loading_default_client);
@@ -324,11 +321,9 @@ cal_shell_sidebar_set_default (ECalShellSidebar *cal_shell_sidebar,
 
 	priv->loading_default_client = g_cancellable_new ();
 
-	e_load_cal_source_async (
-		source, source_type, timezone,
-		GTK_WINDOW (shell_window), priv->loading_default_client,
-		(GAsyncReadyCallback) cal_shell_sidebar_default_loaded_cb,
-		g_object_ref (shell_sidebar));
+	e_client_utils_open_new (source, E_CLIENT_SOURCE_TYPE_EVENTS, FALSE, priv->loading_default_client,
+		e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+		cal_shell_sidebar_default_loaded_cb, g_object_ref (shell_sidebar));
 }
 
 static void
@@ -702,7 +697,7 @@ cal_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
 	source = e_source_selector_get_primary_selection (selector);
 
 	if (source != NULL) {
-		ECal *client;
+		ECalClient *client;
 		const gchar *uri;
 		const gchar *delete;
 
@@ -717,7 +712,7 @@ cal_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
 			cal_shell_sidebar->priv->client_table,
 			e_source_peek_uid (source));
 		refresh_supported =
-			client && e_cal_get_refresh_supported (client);
+			client && e_client_check_refresh_supported (E_CLIENT (client));
 	}
 
 	if (source != NULL)
@@ -734,7 +729,7 @@ cal_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
 
 static void
 cal_shell_sidebar_client_removed (ECalShellSidebar *cal_shell_sidebar,
-                                  ECal *client)
+                                  ECalClient *client)
 {
 	ESourceSelector *selector;
 	GHashTable *client_table;
@@ -748,7 +743,7 @@ cal_shell_sidebar_client_removed (ECalShellSidebar *cal_shell_sidebar,
 		client, G_SIGNAL_MATCH_DATA, 0, 0,
 		NULL, NULL, cal_shell_sidebar);
 
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 	uid = e_source_peek_uid (source);
 	g_return_if_fail (uid != NULL);
 
@@ -793,9 +788,9 @@ cal_shell_sidebar_class_init (ECalShellSidebarClass *class)
 		PROP_DEFAULT_CLIENT,
 		g_param_spec_object (
 			"default-client",
-			"Default Calendar Client",
+			"Default Calendar ECalClient",
 			"Default client for calendar operations",
-			E_TYPE_CAL,
+			E_TYPE_CAL_CLIENT,
 			G_PARAM_READABLE));
 
 	g_object_class_install_property (
@@ -816,7 +811,7 @@ cal_shell_sidebar_class_init (ECalShellSidebarClass *class)
 		NULL, NULL,
 		g_cclosure_marshal_VOID__OBJECT,
 		G_TYPE_NONE, 1,
-		E_TYPE_CAL);
+		E_TYPE_CAL_CLIENT);
 
 	signals[CLIENT_REMOVED] = g_signal_new (
 		"client-removed",
@@ -826,7 +821,7 @@ cal_shell_sidebar_class_init (ECalShellSidebarClass *class)
 		NULL, NULL,
 		g_cclosure_marshal_VOID__OBJECT,
 		G_TYPE_NONE, 1,
-		E_TYPE_CAL);
+		E_TYPE_CAL_CLIENT);
 
 	signals[STATUS_MESSAGE] = g_signal_new (
 		"status-message",
@@ -917,7 +912,7 @@ e_cal_shell_sidebar_get_date_navigator (ECalShellSidebar *cal_shell_sidebar)
 	return E_CALENDAR (cal_shell_sidebar->priv->date_navigator);
 }
 
-ECal *
+ECalClient *
 e_cal_shell_sidebar_get_default_client (ECalShellSidebar *cal_shell_sidebar)
 {
 	g_return_val_if_fail (
@@ -943,12 +938,12 @@ e_cal_shell_sidebar_add_source (ECalShellSidebar *cal_shell_sidebar,
 	EShellContent *shell_content;
 	EShellSidebar *shell_sidebar;
 	ECalShellContent *cal_shell_content;
-	ECalSourceType source_type;
+	ECalClientSourceType source_type;
 	ESourceSelector *selector;
 	GHashTable *client_table;
 	ECalModel *model;
-	ECal *default_client;
-	ECal *client;
+	ECalClient *default_client;
+	ECalClient *client;
 	icaltimezone *timezone;
 	const gchar *uid;
 	const gchar *uri;
@@ -957,7 +952,7 @@ e_cal_shell_sidebar_add_source (ECalShellSidebar *cal_shell_sidebar,
 	g_return_if_fail (E_IS_CAL_SHELL_SIDEBAR (cal_shell_sidebar));
 	g_return_if_fail (E_IS_SOURCE (source));
 
-	source_type = E_CAL_SOURCE_TYPE_EVENT;
+	source_type = E_CAL_CLIENT_SOURCE_TYPE_EVENTS;
 	client_table = cal_shell_sidebar->priv->client_table;
 	default_client = cal_shell_sidebar->priv->default_client;
 	selector = e_cal_shell_sidebar_get_selector (cal_shell_sidebar);
@@ -972,15 +967,18 @@ e_cal_shell_sidebar_add_source (ECalShellSidebar *cal_shell_sidebar,
 		ESource *default_source;
 		const gchar *default_uid;
 
-		default_source = e_cal_get_source (default_client);
+		default_source = e_client_get_source (E_CLIENT (default_client));
 		default_uid = e_source_peek_uid (default_source);
 
 		if (g_strcmp0 (uid, default_uid) == 0)
 			client = g_object_ref (default_client);
 	}
 
-	if (client == NULL)
-		client = e_auth_new_cal_from_source (source, source_type);
+	if (client == NULL) {
+		client = e_cal_client_new (source, source_type, NULL);
+		if (client)
+			g_signal_connect (client, "authenticate", G_CALLBACK (e_client_utils_authenticate_handler), NULL);
+	}
 
 	g_return_if_fail (client != NULL);
 
@@ -997,17 +995,12 @@ e_cal_shell_sidebar_add_source (ECalShellSidebar *cal_shell_sidebar,
 	g_hash_table_insert (client_table, g_strdup (uid), client);
 	e_source_selector_select_source (selector, source);
 
-	uri = e_cal_get_uri (client);
+	uri = e_client_get_uri (E_CLIENT (client));
 	/* Translators: The string field is a URI. */
 	message = g_strdup_printf (_("Opening calendar at %s"), uri);
 	cal_shell_sidebar_emit_status_message (cal_shell_sidebar, message);
 	g_free (message);
 
-	g_signal_connect_swapped (
-		client, "cal-opened-ex",
-		G_CALLBACK (cal_shell_sidebar_client_opened_cb),
-		cal_shell_sidebar);
-
 	/* FIXME Sidebar should not be accessing the EShellContent.
 	 *       This probably needs to be moved to ECalShellView. */
 	shell_sidebar = E_SHELL_SIDEBAR (cal_shell_sidebar);
@@ -1018,8 +1011,8 @@ e_cal_shell_sidebar_add_source (ECalShellSidebar *cal_shell_sidebar,
 	model = e_cal_shell_content_get_model (cal_shell_content);
 	timezone = e_cal_model_get_timezone (model);
 
-	e_cal_set_default_timezone (client, timezone, NULL);
-	e_cal_open_async (client, FALSE);
+	e_cal_client_set_default_timezone (client, timezone);
+	e_client_open (E_CLIENT (client), FALSE, NULL, cal_shell_sidebar_client_opened_cb, cal_shell_sidebar);
 }
 
 void
@@ -1027,7 +1020,7 @@ e_cal_shell_sidebar_remove_source (ECalShellSidebar *cal_shell_sidebar,
                                    ESource *source)
 {
 	GHashTable *client_table;
-	ECal *client;
+	ECalClient *client;
 	const gchar *uid;
 
 	g_return_if_fail (E_IS_CAL_SHELL_SIDEBAR (cal_shell_sidebar));
diff --git a/modules/calendar/e-cal-shell-sidebar.h b/modules/calendar/e-cal-shell-sidebar.h
index 6919d7ab52..3e4d00a87f 100644
--- a/modules/calendar/e-cal-shell-sidebar.h
+++ b/modules/calendar/e-cal-shell-sidebar.h
@@ -22,7 +22,7 @@
 #ifndef E_CAL_SHELL_SIDEBAR_H
 #define E_CAL_SHELL_SIDEBAR_H
 
-#include <libecal/e-cal.h>
+#include <libecal/e-cal-client.h>
 #include <libedataserverui/e-source-selector.h>
 
 #include <shell/e-shell-sidebar.h>
@@ -71,9 +71,9 @@ struct _ECalShellSidebarClass {
 
 	/* Signals */
 	void	(*client_added)			(ECalShellSidebar *cal_shell_sidebar,
-						 ECal *client);
+						 ECalClient *client);
 	void	(*client_removed)		(ECalShellSidebar *cal_shell_sidebar,
-						 ECal *client);
+						 ECalClient *client);
 	void	(*status_message)		(ECalShellSidebar *cal_shell_sidebar,
 						 const gchar *status_message);
 };
@@ -86,7 +86,7 @@ GList *		e_cal_shell_sidebar_get_clients
 					(ECalShellSidebar *cal_shell_sidebar);
 ECalendar *	e_cal_shell_sidebar_get_date_navigator
 					(ECalShellSidebar *cal_shell_sidebar);
-ECal *		e_cal_shell_sidebar_get_default_client
+ECalClient *	e_cal_shell_sidebar_get_default_client
 					(ECalShellSidebar *cal_shell_sidebar);
 ESourceSelector *
 		e_cal_shell_sidebar_get_selector
diff --git a/modules/calendar/e-cal-shell-view-actions.c b/modules/calendar/e-cal-shell-view-actions.c
index c82f0036f5..6537cde8b4 100644
--- a/modules/calendar/e-cal-shell-view-actions.c
+++ b/modules/calendar/e-cal-shell-view-actions.c
@@ -51,7 +51,7 @@ action_calendar_copy_cb (GtkAction *action,
 
 	copy_source_dialog (
 		GTK_WINDOW (shell_window),
-		source, E_CAL_SOURCE_TYPE_EVENT);
+		source, E_CAL_CLIENT_SOURCE_TYPE_EVENTS);
 }
 
 static void
@@ -67,7 +67,7 @@ action_calendar_delete_cb (GtkAction *action,
 	GnomeCalendarViewType view_type;
 	GnomeCalendar *calendar;
 	ECalModel *model;
-	ECal *client;
+	ECalClient *client;
 	ESourceSelector *selector;
 	ESourceGroup *source_group;
 	ESourceList *source_list;
@@ -102,14 +102,14 @@ action_calendar_delete_cb (GtkAction *action,
 	uri = e_source_get_uri (source);
 	client = e_cal_model_get_client_for_uri (model, uri);
 	if (client == NULL)
-		client = e_cal_new_from_uri (uri, E_CAL_SOURCE_TYPE_EVENT);
+		client = e_cal_client_new_from_uri (uri, E_CAL_CLIENT_SOURCE_TYPE_EVENTS, NULL);
 	g_free (uri);
 
 	g_return_if_fail (client != NULL);
 
-	if (!e_cal_remove (client, &error)) {
-		g_warning ("%s", error->message);
-		g_error_free (error);
+	if (!e_client_remove_sync (E_CLIENT (client), NULL, &error)) {
+		g_debug ("%s: Failed to remove client: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		return;
 	}
 
@@ -125,8 +125,8 @@ action_calendar_delete_cb (GtkAction *action,
 	source_list = e_cal_shell_backend_get_source_list (
 		E_CAL_SHELL_BACKEND (shell_backend));
 	if (!e_source_list_sync (source_list, &error)) {
-		g_warning ("%s", error->message);
-		g_error_free (error);
+		g_debug ("%s: Failed to sync source list: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 	}
 }
 
@@ -362,7 +362,7 @@ action_calendar_refresh_cb (GtkAction *action,
 	ECalShellContent *cal_shell_content;
 	ECalShellSidebar *cal_shell_sidebar;
 	ESourceSelector *selector;
-	ECal *client;
+	ECalClient *client;
 	ECalModel *model;
 	ESource *source;
 	gchar *uri;
@@ -384,14 +384,11 @@ action_calendar_refresh_cb (GtkAction *action,
 	if (client == NULL)
 		return;
 
-	g_return_if_fail (e_cal_get_refresh_supported (client));
+	g_return_if_fail (e_client_check_refresh_supported (E_CLIENT (client)));
 
-	if (!e_cal_refresh (client, &error) && error) {
-		g_warning (
-			"%s: Failed to refresh '%s', %s\n",
-			G_STRFUNC, e_source_peek_name (source),
-			error->message);
-		g_error_free (error);
+	if (!e_client_refresh_sync (E_CLIENT (client), NULL, &error)) {
+		g_debug ("%s: Failed to refresh '%s', %s\n", G_STRFUNC, e_source_peek_name (source), error ? error->message : "Unknown error");
+		g_clear_error (&error);
 	}
 }
 
@@ -499,8 +496,9 @@ action_event_copy_cb (GtkAction *action,
 	GnomeCalendar *calendar;
 	ECalendarView *calendar_view;
 	ESource *source_source = NULL, *destination_source = NULL;
-	ECal *destination_client = NULL;
+	ECalClient *destination_client = NULL;
 	GList *selected, *iter;
+	GError *error = NULL;
 
 	shell_view = E_SHELL_VIEW (cal_shell_view);
 	shell_window = e_shell_view_get_shell_window (shell_view);
@@ -517,22 +515,27 @@ action_event_copy_cb (GtkAction *action,
 		ECalendarViewEvent *event = selected->data;
 
 		if (is_comp_data_valid (event) && event->comp_data->client)
-			source_source = e_cal_get_source (event->comp_data->client);
+			source_source = e_client_get_source (E_CLIENT (event->comp_data->client));
 	}
 
 	/* Get a destination source from the user. */
 	destination_source = select_source_dialog (
-		GTK_WINDOW (shell_window), E_CAL_SOURCE_TYPE_EVENT, source_source);
+		GTK_WINDOW (shell_window), E_CAL_CLIENT_SOURCE_TYPE_EVENTS, source_source);
 	if (destination_source == NULL)
 		return;
 
 	/* Open the destination calendar. */
-	destination_client = e_auth_new_cal_from_source (
-		destination_source, E_CAL_SOURCE_TYPE_EVENT);
+	destination_client = e_cal_client_new (
+		destination_source, E_CAL_CLIENT_SOURCE_TYPE_EVENTS, NULL);
 	if (destination_client == NULL)
 		goto exit;
-	if (!e_cal_open (destination_client, FALSE, NULL))
+	g_signal_connect (destination_client, "authenticate", G_CALLBACK (e_client_utils_authenticate_handler), NULL);
+
+	if (!e_client_open_sync (E_CLIENT (destination_client), FALSE, NULL, &error)) {
+		g_debug ("%s: Failed to open destination client: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		goto exit;
+	}
 
 	e_cal_shell_view_set_status_message (
 		cal_shell_view, _("Copying Items"), -1.0);
@@ -565,7 +568,7 @@ action_event_delegate_cb (GtkAction *action,
 	ECalendarView *calendar_view;
 	ECalendarViewEvent *event;
 	ECalComponent *component;
-	ECal *client;
+	ECalClient *client;
 	GList *selected;
 	icalcomponent *clone;
 	icalproperty *property;
@@ -702,7 +705,7 @@ action_event_forward_cb (GtkAction *action,
 	GnomeCalendar *calendar;
 	ECalendarViewEvent *event;
 	ECalComponent *component;
-	ECal *client;
+	ECalClient *client;
 	icalcomponent *icalcomp;
 	GList *selected;
 
@@ -769,8 +772,9 @@ action_event_move_cb (GtkAction *action,
 	GnomeCalendar *calendar;
 	ECalendarView *calendar_view;
 	ESource *source_source = NULL, *destination_source = NULL;
-	ECal *destination_client = NULL;
+	ECalClient *destination_client = NULL;
 	GList *selected, *iter;
+	GError *error = NULL;
 
 	shell_view = E_SHELL_VIEW (cal_shell_view);
 	shell_window = e_shell_view_get_shell_window (shell_view);
@@ -787,22 +791,26 @@ action_event_move_cb (GtkAction *action,
 		ECalendarViewEvent *event = selected->data;
 
 		if (is_comp_data_valid (event) && event->comp_data->client)
-			source_source = e_cal_get_source (event->comp_data->client);
+			source_source = e_client_get_source (E_CLIENT (event->comp_data->client));
 	}
 
 	/* Get a destination source from the user. */
 	destination_source = select_source_dialog (
-		GTK_WINDOW (shell_window), E_CAL_SOURCE_TYPE_EVENT, source_source);
+		GTK_WINDOW (shell_window), E_CAL_CLIENT_SOURCE_TYPE_EVENTS, source_source);
 	if (destination_source == NULL)
 		return;
 
 	/* Open the destination calendar. */
-	destination_client = e_auth_new_cal_from_source (
-		destination_source, E_CAL_SOURCE_TYPE_EVENT);
+	destination_client = e_cal_client_new (destination_source, E_CAL_CLIENT_SOURCE_TYPE_EVENTS, NULL);
 	if (destination_client == NULL)
 		goto exit;
-	if (!e_cal_open (destination_client, FALSE, NULL))
+	g_signal_connect (destination_client, "authenticate", G_CALLBACK (e_client_utils_authenticate_handler), NULL);
+
+	if (!e_client_open_sync (E_CLIENT (destination_client), FALSE, NULL, &error)) {
+		g_debug ("%s: Failed to open destination client: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		goto exit;
+	}
 
 	e_cal_shell_view_set_status_message (
 		cal_shell_view, _("Moving Items"), -1.0);
@@ -856,7 +864,7 @@ action_event_occurrence_movable_cb (GtkAction *action,
 	ECalComponent *recurring_component;
 	ECalComponentDateTime date;
 	ECalComponentId *id;
-	ECal *client;
+	ECalClient *client;
 	icalcomponent *icalcomp;
 	icaltimetype itt;
 	icaltimezone *timezone;
@@ -922,14 +930,14 @@ action_event_occurrence_movable_cb (GtkAction *action,
 	*  since at present the updates happend synchronously so our
 	*  event may disappear. */
 
-	e_cal_remove_object_with_mod (
-		client, id->uid, id->rid, CALOBJ_MOD_THIS, NULL);
+	e_cal_client_remove_object_sync (
+		client, id->uid, id->rid, CALOBJ_MOD_THIS, NULL, NULL);
 
 	e_cal_component_free_id (id);
 	g_object_unref (recurring_component);
 
 	icalcomp = e_cal_component_get_icalcomponent (exception_component);
-	if (e_cal_create_object (client, icalcomp, &uid, NULL))
+	if (e_cal_client_create_object_sync (client, icalcomp, &uid, NULL, NULL))
 		g_free (uid);
 
 	g_object_unref (exception_component);
@@ -965,7 +973,7 @@ action_event_print_cb (GtkAction *action,
 	ECalendarViewEvent *event;
 	ECalComponent *component;
 	ECalModel *model;
-	ECal *client;
+	ECalClient *client;
 	icalcomponent *icalcomp;
 	GList *selected;
 
@@ -1011,7 +1019,7 @@ action_event_reply_cb (GtkAction *action,
 	GnomeCalendar *calendar;
 	ECalendarViewEvent *event;
 	ECalComponent *component;
-	ECal *client;
+	ECalClient *client;
 	icalcomponent *icalcomp;
 	GList *selected;
 	gboolean reply_all = FALSE;
@@ -1055,7 +1063,7 @@ action_event_reply_all_cb (GtkAction *action,
 	GnomeCalendar *calendar;
 	ECalendarViewEvent *event;
 	ECalComponent *component;
-	ECal *client;
+	ECalClient *client;
 	icalcomponent *icalcomp;
 	GList *selected;
 	gboolean reply_all = TRUE;
@@ -1102,7 +1110,7 @@ action_event_save_as_cb (GtkAction *action,
 	GnomeCalendar *calendar;
 	ECalendarView *calendar_view;
 	ECalendarViewEvent *event;
-	ECal *client;
+	ECalClient *client;
 	icalcomponent *icalcomp;
 	EActivity *activity;
 	GList *selected;
@@ -1140,7 +1148,7 @@ action_event_save_as_cb (GtkAction *action,
 	if (file == NULL)
 		return;
 
-	string = e_cal_get_component_as_string (client, icalcomp);
+	string = e_cal_client_get_component_as_string (client, icalcomp);
 	if (string == NULL) {
 		g_warning ("Could not convert item to a string");
 		goto exit;
@@ -1172,7 +1180,7 @@ edit_event_as (ECalShellView *cal_shell_view, gboolean as_meeting)
 	GnomeCalendar *calendar;
 	ECalendarView *calendar_view;
 	ECalendarViewEvent *event;
-	ECal *client;
+	ECalClient *client;
 	icalcomponent *icalcomp;
 	GList *selected;
 
diff --git a/modules/calendar/e-cal-shell-view-memopad.c b/modules/calendar/e-cal-shell-view-memopad.c
index 84d14cf09b..e154667826 100644
--- a/modules/calendar/e-cal-shell-view-memopad.c
+++ b/modules/calendar/e-cal-shell-view-memopad.c
@@ -66,7 +66,7 @@ action_calendar_memopad_new_cb (GtkAction *action,
 	ECalShellContent *cal_shell_content;
 	EMemoTable *memo_table;
 	ECalModelComponent *comp_data;
-	ECal *client;
+	ECalClient *client;
 	ECalComponent *comp;
 	CompEditor *editor;
 	GSList *list;
@@ -224,7 +224,7 @@ action_calendar_memopad_save_as_cb (GtkAction *action,
 		return;
 
 	/* XXX We only save the first selected memo. */
-	string = e_cal_get_component_as_string (
+	string = e_cal_client_get_component_as_string (
 		comp_data->client, comp_data->icalcomp);
 	if (string == NULL) {
 		g_warning ("Could not convert memo to a string.");
@@ -355,7 +355,7 @@ e_cal_shell_view_memopad_actions_update (ECalShellView *cal_shell_view)
 		icalproperty *prop;
 		gboolean read_only;
 
-		e_cal_is_read_only (comp_data->client, &read_only, NULL);
+		read_only = e_client_is_readonly (E_CLIENT (comp_data->client));
 		editable &= !read_only;
 
 		prop = icalcomponent_get_first_property (
diff --git a/modules/calendar/e-cal-shell-view-private.c b/modules/calendar/e-cal-shell-view-private.c
index c6c9fa5673..d4cee1a627 100644
--- a/modules/calendar/e-cal-shell-view-private.c
+++ b/modules/calendar/e-cal-shell-view-private.c
@@ -283,7 +283,7 @@ cal_shell_view_selector_popup_event_cb (EShellView *shell_view,
 
 static void
 cal_shell_view_selector_client_added_cb (ECalShellView *cal_shell_view,
-                                         ECal *client)
+                                         ECalClient *client)
 {
 	ECalShellContent *cal_shell_content;
 	GnomeCalendar *calendar;
@@ -300,7 +300,7 @@ cal_shell_view_selector_client_added_cb (ECalShellView *cal_shell_view,
 
 static void
 cal_shell_view_selector_client_removed_cb (ECalShellView *cal_shell_view,
-                                           ECal *client)
+                                           ECalClient *client)
 {
 	ECalShellContent *cal_shell_content;
 	GnomeCalendar *calendar;
@@ -341,12 +341,12 @@ cal_shell_view_user_created_cb (ECalShellView *cal_shell_view,
 {
 	ECalShellSidebar *cal_shell_sidebar;
 	ECalModel *model;
-	ECal *client;
+	ECalClient *client;
 	ESource *source;
 
 	model = e_calendar_view_get_model (calendar_view);
 	client = e_cal_model_get_default_client (model);
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 
 	cal_shell_sidebar = cal_shell_view->priv->cal_shell_sidebar;
 	e_cal_shell_sidebar_add_source (cal_shell_sidebar, source);
@@ -824,7 +824,7 @@ e_cal_shell_view_set_status_message (ECalShellView *cal_shell_view,
 void
 e_cal_shell_view_transfer_item_to (ECalShellView *cal_shell_view,
                                    ECalendarViewEvent *event,
-                                   ECal *destination_client,
+                                   ECalClient *destination_client,
                                    gboolean remove)
 {
 	icalcomponent *icalcomp;
@@ -838,7 +838,7 @@ e_cal_shell_view_transfer_item_to (ECalShellView *cal_shell_view,
 
 	g_return_if_fail (E_IS_CAL_SHELL_VIEW (cal_shell_view));
 	g_return_if_fail (event != NULL);
-	g_return_if_fail (E_IS_CAL (destination_client));
+	g_return_if_fail (E_IS_CAL_CLIENT (destination_client));
 
 	if (!is_comp_data_valid (event))
 		return;
@@ -848,25 +848,26 @@ e_cal_shell_view_transfer_item_to (ECalShellView *cal_shell_view,
 
 	/* Put the new object into the destination calendar. */
 
-	success = e_cal_get_object (
-		destination_client, uid, NULL, &icalcomp, NULL);
+	success = e_cal_client_get_object_sync (
+		destination_client, uid, NULL, &icalcomp, NULL, NULL);
 
 	if (success) {
 		icalcomponent_free (icalcomp);
-		success = e_cal_modify_object (
+		success = e_cal_client_modify_object_sync (
 			destination_client, icalcomp_event,
-			CALOBJ_MOD_ALL, NULL);
+			CALOBJ_MOD_ALL, NULL, NULL);
 
 		/* do not delete the event when it was found in the calendar */
 		return;
 	} else {
 		icalproperty *icalprop;
 		gchar *new_uid;
+		GError *error = NULL;
 
 		if (e_cal_util_component_is_instance (icalcomp_event)) {
-			success = e_cal_get_object (
+			success = e_cal_client_get_object_sync (
 				event->comp_data->client,
-				uid, NULL, &icalcomp, NULL);
+				uid, NULL, &icalcomp, NULL, NULL);
 			if (success) {
 				/* Use master object when working
 				 * with a recurring event ... */
@@ -904,10 +905,11 @@ e_cal_shell_view_transfer_item_to (ECalShellView *cal_shell_view,
 		}
 
 		new_uid = NULL;
-		success = e_cal_create_object (
-			destination_client, icalcomp_clone, &new_uid, NULL);
+		success = e_cal_client_create_object_sync (
+			destination_client, icalcomp_clone, &new_uid, NULL, &error);
 		if (!success) {
 			icalcomponent_free (icalcomp_clone);
+			g_debug ("%s: Failed to create object: %s", G_STRFUNC, error ? error->message : "Unknown error");
 			return;
 		}
 
@@ -916,7 +918,7 @@ e_cal_shell_view_transfer_item_to (ECalShellView *cal_shell_view,
 	}
 
 	if (remove) {
-		ECal *source_client = event->comp_data->client;
+		ECalClient *source_client = event->comp_data->client;
 
 		/* Remove the item from the source calendar. */
 		if (e_cal_util_component_is_instance (icalcomp_event) ||
@@ -930,11 +932,11 @@ e_cal_shell_view_transfer_item_to (ECalShellView *cal_shell_view,
 				rid = icaltime_as_ical_string_r (icaltime);
 			else
 				rid = NULL;
-			e_cal_remove_object_with_mod (
-				source_client, uid, rid, CALOBJ_MOD_ALL, NULL);
+			e_cal_client_remove_object_sync (
+				source_client, uid, rid, CALOBJ_MOD_ALL, NULL, NULL);
 			g_free (rid);
 		} else
-			e_cal_remove_object (source_client, uid, NULL);
+			e_cal_client_remove_object_sync (source_client, uid, NULL, CALOBJ_MOD_THIS, NULL, NULL);
 	}
 }
 
@@ -1091,10 +1093,10 @@ e_cal_shell_view_update_timezone (ECalShellView *cal_shell_view)
 	clients = e_cal_shell_sidebar_get_clients (cal_shell_sidebar);
 
 	for (iter = clients; iter != NULL; iter = iter->next) {
-		ECal *client = iter->data;
+		ECalClient *client = iter->data;
 
-		if (e_cal_get_load_state (client) == E_CAL_LOAD_LOADED)
-			e_cal_set_default_timezone (client, timezone, NULL);
+		if (e_client_is_opened (E_CLIENT (client)))
+			e_cal_client_set_default_timezone (client, timezone);
 	}
 
 	g_list_free (clients);
diff --git a/modules/calendar/e-cal-shell-view-private.h b/modules/calendar/e-cal-shell-view-private.h
index 52ec374295..7c78130fc3 100644
--- a/modules/calendar/e-cal-shell-view-private.h
+++ b/modules/calendar/e-cal-shell-view-private.h
@@ -31,6 +31,7 @@
 #include <libedataserver/e-categories.h>
 #include <libedataserver/e-data-server-util.h>
 #include <libedataserver/e-sexp.h>
+#include <libedataserverui/e-client-utils.h>
 
 #include "e-util/e-account-utils.h"
 #include "e-util/e-selection.h"
@@ -41,7 +42,6 @@
 #include "misc/e-popup-action.h"
 #include "misc/e-selectable.h"
 
-#include "calendar/common/authentication.h"
 #include "calendar/gui/calendar-config.h"
 #include "calendar/gui/comp-util.h"
 #include "calendar/gui/e-cal-list-view.h"
@@ -142,7 +142,7 @@ void		e_cal_shell_view_set_status_message
 void		e_cal_shell_view_transfer_item_to
 					(ECalShellView *cal_shell_view,
 					 ECalendarViewEvent *event,
-					 ECal *destination_client,
+					 ECalClient *destination_client,
 					 gboolean remove);
 void		e_cal_shell_view_update_sidebar
 					(ECalShellView *cal_shell_view);
diff --git a/modules/calendar/e-cal-shell-view-taskpad.c b/modules/calendar/e-cal-shell-view-taskpad.c
index 48fd850790..48c81ac085 100644
--- a/modules/calendar/e-cal-shell-view-taskpad.c
+++ b/modules/calendar/e-cal-shell-view-taskpad.c
@@ -135,7 +135,7 @@ action_calendar_taskpad_new_cb (GtkAction *action,
 	ECalShellContent *cal_shell_content;
 	ECalModelComponent *comp_data;
 	ETaskTable *task_table;
-	ECal *client;
+	ECalClient *client;
 	ECalComponent *comp;
 	CompEditor *editor;
 	GSList *list;
@@ -290,7 +290,7 @@ action_calendar_taskpad_save_as_cb (GtkAction *action,
 	if (file == NULL)
 		return;
 
-	string = e_cal_get_component_as_string (
+	string = e_cal_client_get_component_as_string (
 		comp_data->client, comp_data->icalcomp);
 	if (string == NULL) {
 		g_warning ("Could not convert task to a string");
@@ -446,15 +446,15 @@ e_cal_shell_view_taskpad_actions_update (ECalShellView *cal_shell_view)
 		const gchar *cap;
 		gboolean read_only;
 
-		e_cal_is_read_only (comp_data->client, &read_only, NULL);
+		read_only = e_client_is_readonly (E_CLIENT (comp_data->client));
 		editable &= !read_only;
 
 		cap = CAL_STATIC_CAPABILITY_NO_TASK_ASSIGNMENT;
-		if (e_cal_get_static_capability (comp_data->client, cap))
+		if (e_client_check_capability (E_CLIENT (comp_data->client), cap))
 			assignable = FALSE;
 
 		cap = CAL_STATIC_CAPABILITY_NO_CONV_TO_ASSIGN_TASK;
-		if (e_cal_get_static_capability (comp_data->client, cap))
+		if (e_client_check_capability (E_CLIENT (comp_data->client), cap))
 			assignable = FALSE;
 
 		prop = icalcomponent_get_first_property (
diff --git a/modules/calendar/e-cal-shell-view.c b/modules/calendar/e-cal-shell-view.c
index 1d7269cd55..2249bf96e4 100644
--- a/modules/calendar/e-cal-shell-view.c
+++ b/modules/calendar/e-cal-shell-view.c
@@ -353,7 +353,7 @@ cal_shell_view_update_actions (EShellView *shell_view)
 
 	for (iter = list; iter != NULL; iter = iter->next) {
 		ECalendarViewEvent *event = iter->data;
-		ECal *client;
+		ECalClient *client;
 		ECalComponent *comp;
 		icalcomponent *icalcomp;
 		gchar *user_email = NULL;
@@ -366,7 +366,7 @@ cal_shell_view_update_actions (EShellView *shell_view)
 		client = event->comp_data->client;
 		icalcomp = event->comp_data->icalcomp;
 
-		e_cal_is_read_only (client, &read_only, NULL);
+		read_only = e_client_is_readonly (E_CLIENT (client));
 		editable = editable && !read_only;
 
 		is_instance |= e_cal_util_component_is_instance (icalcomp);
@@ -391,11 +391,9 @@ cal_shell_view_update_actions (EShellView *shell_view)
 			itip_organizer_is_user (comp, client);
 
 		is_delegatable =
-			e_cal_get_static_capability (
-				client, CAL_STATIC_CAPABILITY_DELEGATE_SUPPORTED) &&
-			((e_cal_get_static_capability (
-				client, CAL_STATIC_CAPABILITY_DELEGATE_TO_MANY)) ||
-			(!user_org && !is_delegated (icalcomp, user_email)));
+			e_client_check_capability (E_CLIENT (client), CAL_STATIC_CAPABILITY_DELEGATE_SUPPORTED) &&
+			     (e_client_check_capability (E_CLIENT (client), CAL_STATIC_CAPABILITY_DELEGATE_TO_MANY) ||
+			      (!user_org && !is_delegated (icalcomp, user_email)));
 
 		g_free (user_email);
 		g_object_unref (comp);
diff --git a/modules/calendar/e-calendar-preferences.c b/modules/calendar/e-calendar-preferences.c
index ec15e3c2d1..f35c88a6ed 100644
--- a/modules/calendar/e-calendar-preferences.c
+++ b/modules/calendar/e-calendar-preferences.c
@@ -435,7 +435,7 @@ show_alarms_config (ECalendarPreferences *prefs)
 {
 	GConfClient *gconf;
 
-	if (e_cal_get_sources (&prefs->alarms_list, E_CAL_SOURCE_TYPE_EVENT, NULL)) {
+	if (e_cal_client_get_sources (&prefs->alarms_list, E_CAL_CLIENT_SOURCE_TYPE_EVENTS, NULL)) {
 		prefs->alarm_list_widget = e_source_selector_new (prefs->alarms_list);
 		atk_object_set_name (gtk_widget_get_accessible (prefs->alarm_list_widget), _("Selected Calendars for Alarms"));
 		gtk_container_add (GTK_CONTAINER (prefs->scrolled_window), prefs->alarm_list_widget);
diff --git a/modules/calendar/e-memo-shell-backend.c b/modules/calendar/e-memo-shell-backend.c
index e99e3e2931..8d39843054 100644
--- a/modules/calendar/e-memo-shell-backend.c
+++ b/modules/calendar/e-memo-shell-backend.c
@@ -27,17 +27,17 @@
 
 #include <string.h>
 #include <glib/gi18n.h>
-#include <libecal/e-cal.h>
+#include <libecal/e-cal-client.h>
 #include <libedataserver/e-url.h>
 #include <libedataserver/e-source.h>
 #include <libedataserver/e-source-list.h>
 #include <libedataserver/e-source-group.h>
+#include <libedataserverui/e-client-utils.h>
 
 #include "shell/e-shell.h"
 #include "shell/e-shell-backend.h"
 #include "shell/e-shell-window.h"
 
-#include "calendar/common/authentication.h"
 #include "calendar/gui/comp-util.h"
 #include "calendar/gui/dialogs/calendar-setup.h"
 #include "calendar/gui/dialogs/memo-editor.h"
@@ -75,6 +75,7 @@ memo_shell_backend_ensure_sources (EShellBackend *shell_backend)
 	GSList *sources, *iter;
 	const gchar *name;
 	gboolean save_list = FALSE;
+	GError *error = NULL;
 
 	personal = NULL;
 
@@ -83,10 +84,11 @@ memo_shell_backend_ensure_sources (EShellBackend *shell_backend)
 	shell = e_shell_backend_get_shell (shell_backend);
 	shell_settings = e_shell_get_shell_settings (shell);
 
-	if (!e_cal_get_sources (
+	if (!e_cal_client_get_sources (
 		&memo_shell_backend->priv->source_list,
-		E_CAL_SOURCE_TYPE_JOURNAL, NULL)) {
-		g_warning ("Could not get memo sources from GConf!");
+		E_CAL_CLIENT_SOURCE_TYPE_MEMOS, &error)) {
+		g_debug ("%s: Could not get memo sources: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		return;
 	}
 
@@ -164,43 +166,50 @@ memo_shell_backend_new_memo (ESource *source,
                              EShell *shell,
                              CompEditorFlags flags)
 {
-	ECal *cal;
+	EClient *client = NULL;
+	ECalClient *cal_client;
 	ECalComponent *comp;
 	CompEditor *editor;
+	GError *error = NULL;
+
+	if (!e_client_utils_open_new_finish (source, result, &client, &error))
+		client = NULL;
 
 	/* XXX Handle errors better. */
-	cal = e_load_cal_source_finish (source, result, NULL);
-	g_return_if_fail (E_IS_CAL (cal));
+	if (!client) {
+		g_debug ("%s: Failed to open '%s': %s", G_STRFUNC, e_source_peek_name (source), error ? error->message : "Unknown error");
+		g_clear_error (&error);
+		return;
+	}
 
-	comp = cal_comp_memo_new_with_defaults (cal);
+	g_return_if_fail (E_IS_CAL_CLIENT (client));
+
+	cal_client = E_CAL_CLIENT (client);
+	comp = cal_comp_memo_new_with_defaults (cal_client);
 	cal_comp_update_time_by_active_window (comp, shell);
-	editor = memo_editor_new (cal, shell, flags);
+	editor = memo_editor_new (cal_client, shell, flags);
 	comp_editor_edit_comp (editor, comp);
 
 	gtk_window_present (GTK_WINDOW (editor));
 
 	g_object_unref (comp);
-	g_object_unref (cal);
+	g_object_unref (client);
 }
 
 static void
-memo_shell_backend_memo_new_cb (ESource *source,
-                                GAsyncResult *result,
-                                EShell *shell)
+memo_shell_backend_memo_new_cb (GObject *source_object, GAsyncResult *result, gpointer shell)
 {
 	CompEditorFlags flags = 0;
 
 	flags |= COMP_EDITOR_NEW_ITEM;
 
-	memo_shell_backend_new_memo (source, result, shell, flags);
+	memo_shell_backend_new_memo (E_SOURCE (source_object), result, shell, flags);
 
 	g_object_unref (shell);
 }
 
 static void
-memo_shell_backend_memo_shared_new_cb (ESource *source,
-                                       GAsyncResult *result,
-                                       EShell *shell)
+memo_shell_backend_memo_shared_new_cb (GObject *source_object, GAsyncResult *result, gpointer shell)
 {
 	CompEditorFlags flags = 0;
 
@@ -208,7 +217,7 @@ memo_shell_backend_memo_shared_new_cb (ESource *source,
 	flags |= COMP_EDITOR_IS_SHARED;
 	flags |= COMP_EDITOR_USER_ORG;
 
-	memo_shell_backend_new_memo (source, result, shell, flags);
+	memo_shell_backend_new_memo (E_SOURCE (source_object), result, shell, flags);
 
 	g_object_unref (shell);
 }
@@ -222,14 +231,11 @@ action_memo_new_cb (GtkAction *action,
 	EShellSettings *shell_settings;
 	ESource *source = NULL;
 	ESourceList *source_list;
-	ECalSourceType source_type;
 	const gchar *action_name;
 	gchar *uid;
 
 	/* This callback is used for both memos and shared memos. */
 
-	source_type = E_CAL_SOURCE_TYPE_JOURNAL;
-
 	shell = e_shell_window_get_shell (shell_window);
 	shell_settings = e_shell_get_shell_settings (shell);
 	shell_backend = e_shell_get_backend_by_name (shell, "memos");
@@ -254,19 +260,13 @@ action_memo_new_cb (GtkAction *action,
 	 * FIXME Need to obtain a better default time zone. */
 	action_name = gtk_action_get_name (action);
 	if (g_strcmp0 (action_name, "memo-shared-new") == 0)
-		e_load_cal_source_async (
-			source, source_type, NULL,
-			GTK_WINDOW (shell_window),
-			NULL, (GAsyncReadyCallback)
-			memo_shell_backend_memo_shared_new_cb,
-			g_object_ref (shell));
+		e_client_utils_open_new (source, E_CLIENT_SOURCE_TYPE_MEMOS, FALSE, NULL,
+			e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+			memo_shell_backend_memo_shared_new_cb, g_object_ref (shell));
 	else
-		e_load_cal_source_async (
-			source, source_type, NULL,
-			GTK_WINDOW (shell_window),
-			NULL, (GAsyncReadyCallback)
-			memo_shell_backend_memo_new_cb,
-			g_object_ref (shell));
+		e_client_utils_open_new (source, E_CLIENT_SOURCE_TYPE_MEMOS, FALSE, NULL,
+			e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+			memo_shell_backend_memo_new_cb, g_object_ref (shell));
 
 	g_object_unref (source_list);
 }
@@ -312,11 +312,11 @@ memo_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	EShell *shell;
 	CompEditor *editor;
 	CompEditorFlags flags = 0;
-	ECal *client;
+	ECalClient *client;
 	ECalComponent *comp;
 	ESource *source;
 	ESourceList *source_list;
-	ECalSourceType source_type;
+	ECalClientSourceType source_type;
 	EUri *euri;
 	icalcomponent *icalcomp;
 	const gchar *cp;
@@ -326,7 +326,7 @@ memo_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	gboolean handled = FALSE;
 	GError *error = NULL;
 
-	source_type = E_CAL_SOURCE_TYPE_JOURNAL;
+	source_type = E_CAL_CLIENT_SOURCE_TYPE_MEMOS;
 	shell = e_shell_backend_get_shell (shell_backend);
 
 	if (strncmp (uri, "memo:", 5) != 0)
@@ -379,8 +379,9 @@ memo_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	 * we successfully open it is another matter... */
 	handled = TRUE;
 
-	if (!e_cal_get_sources (&source_list, source_type, NULL)) {
-		g_printerr ("Could not get memo sources from GConf!\n");
+	if (!e_cal_client_get_sources (&source_list, source_type, &error)) {
+		g_debug ("%s: Could not get memo sources: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		goto exit;
 	}
 
@@ -391,12 +392,13 @@ memo_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 		goto exit;
 	}
 
-	client = e_auth_new_cal_from_source (source, source_type);
-	if (client == NULL || !e_cal_open (client, TRUE, &error)) {
-		if (error != NULL) {
-			g_printerr ("%s\n", error->message);
-			g_error_free (error);
-		}
+	client = e_cal_client_new (source, source_type, &error);
+	if (client)
+		g_signal_connect (client, "authenticate", G_CALLBACK (e_client_utils_authenticate_handler), NULL);
+
+	if (client == NULL || !e_client_open_sync (E_CLIENT (client), TRUE, NULL, &error)) {
+		g_debug ("%s: Failed to create/open client: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		g_object_unref (source_list);
 		goto exit;
 	}
@@ -409,10 +411,10 @@ memo_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	if (editor != NULL)
 		goto present;
 
-	if (!e_cal_get_object (client, comp_uid, comp_rid, &icalcomp, &error)) {
-		g_printerr ("%s\n", error->message);
+	if (!e_cal_client_get_object_sync (client, comp_uid, comp_rid, &icalcomp, NULL, &error)) {
+		g_debug ("%s: Failed to get object: %s", G_STRFUNC, error ? error->message : "Unknown error");
 		g_object_unref (source_list);
-		g_error_free (error);
+		g_clear_error (&error);
 		goto exit;
 	}
 
diff --git a/modules/calendar/e-memo-shell-content.c b/modules/calendar/e-memo-shell-content.c
index 9f7d0768b9..f0f4fe958f 100644
--- a/modules/calendar/e-memo-shell-content.c
+++ b/modules/calendar/e-memo-shell-content.c
@@ -115,7 +115,7 @@ memo_shell_content_table_foreach_cb (gint model_row,
 		ESource *source;
 		const gchar *source_uid;
 
-		source = e_cal_get_source (comp_data->client);
+		source = e_client_get_source (E_CLIENT (comp_data->client));
 		source_uid = e_source_peek_uid (source);
 
 		foreach_data->list = g_slist_prepend (
@@ -575,7 +575,7 @@ memo_shell_content_check_state (EShellContent *shell_content)
 		icalproperty *prop;
 		gboolean read_only;
 
-		e_cal_is_read_only (comp_data->client, &read_only, NULL);
+		read_only = e_client_is_readonly (E_CLIENT (comp_data->client));
 		editable &= !read_only;
 
 		prop = icalcomponent_get_first_property (
diff --git a/modules/calendar/e-memo-shell-sidebar.c b/modules/calendar/e-memo-shell-sidebar.c
index befe60cbc1..5a28611652 100644
--- a/modules/calendar/e-memo-shell-sidebar.c
+++ b/modules/calendar/e-memo-shell-sidebar.c
@@ -27,11 +27,11 @@
 
 #include <string.h>
 #include <glib/gi18n.h>
-#include <libecal/e-cal.h>
+#include <libecal/e-cal-client.h>
+#include <libedataserverui/e-client-utils.h>
 
 #include "e-util/e-alert-dialog.h"
 #include "e-util/e-util.h"
-#include "calendar/common/authentication.h"
 #include "calendar/gui/e-memo-list-selector.h"
 #include "calendar/gui/misc.h"
 
@@ -52,7 +52,7 @@ struct _EMemoShellSidebarPrivate {
 	 * opened.  So the user first highlights a source, then
 	 * sometime later we update our default-client property
 	 * which is bound by an EBinding to ECalModel. */
-	ECal *default_client;
+	ECalClient *default_client;
 
 	GCancellable *loading_default_client;
 };
@@ -76,7 +76,7 @@ static GType memo_shell_sidebar_type;
 
 static void
 memo_shell_sidebar_emit_client_added (EMemoShellSidebar *memo_shell_sidebar,
-                                      ECal *client)
+                                      ECalClient *client)
 {
 	guint signal_id = signals[CLIENT_ADDED];
 
@@ -85,7 +85,7 @@ memo_shell_sidebar_emit_client_added (EMemoShellSidebar *memo_shell_sidebar,
 
 static void
 memo_shell_sidebar_emit_client_removed (EMemoShellSidebar *memo_shell_sidebar,
-                                        ECal *client)
+                                        ECalClient *client)
 {
 	guint signal_id = signals[CLIENT_REMOVED];
 
@@ -103,7 +103,7 @@ memo_shell_sidebar_emit_status_message (EMemoShellSidebar *memo_shell_sidebar,
 
 static void
 memo_shell_sidebar_backend_died_cb (EMemoShellSidebar *memo_shell_sidebar,
-                                    ECal *client)
+                                    ECalClient *client)
 {
 	EShellView *shell_view;
 	EShellContent *shell_content;
@@ -118,7 +118,7 @@ memo_shell_sidebar_backend_died_cb (EMemoShellSidebar *memo_shell_sidebar,
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
 
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 	uid = e_source_peek_uid (source);
 
 	g_object_ref (source);
@@ -136,7 +136,7 @@ memo_shell_sidebar_backend_died_cb (EMemoShellSidebar *memo_shell_sidebar,
 static void
 memo_shell_sidebar_backend_error_cb (EMemoShellSidebar *memo_shell_sidebar,
                                      const gchar *message,
-                                     ECal *client)
+                                     ECalClient *client)
 {
 	EShellView *shell_view;
 	EShellContent *shell_content;
@@ -148,7 +148,7 @@ memo_shell_sidebar_backend_error_cb (EMemoShellSidebar *memo_shell_sidebar,
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
 
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 	source_group = e_source_peek_group (source);
 
 	e_alert_submit (
@@ -159,38 +159,43 @@ memo_shell_sidebar_backend_error_cb (EMemoShellSidebar *memo_shell_sidebar,
 }
 
 static void
-memo_shell_sidebar_client_opened_cb (EMemoShellSidebar *memo_shell_sidebar,
-                                     const GError *error,
-                                     ECal *client)
+memo_shell_sidebar_client_opened_cb (GObject *source_object, GAsyncResult *result, gpointer user_data)
 {
+	ECalClient *client = E_CAL_CLIENT (source_object);
+	EMemoShellSidebar *memo_shell_sidebar = user_data;
 	EShellView *shell_view;
 	EShellContent *shell_content;
 	EShellSidebar *shell_sidebar;
 	const gchar *message;
+	GError *error = NULL;
 
 	shell_sidebar = E_SHELL_SIDEBAR (memo_shell_sidebar);
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
 
-	if (g_error_matches (error, E_CALENDAR_ERROR,
-		E_CALENDAR_STATUS_AUTHENTICATION_FAILED) ||
-	    g_error_matches (error, E_CALENDAR_ERROR,
-		E_CALENDAR_STATUS_AUTHENTICATION_REQUIRED))
-		e_auth_cal_forget_password (client);
+	e_client_open_finish (E_CLIENT (client), result, &error);
+
+	if (g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_AUTHENTICATION_FAILED) ||
+	    g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_AUTHENTICATION_REQUIRED))
+		e_client_utils_forget_password (E_CLIENT (client));
+
+	if (g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_AUTHENTICATION_FAILED)) {
+		e_client_open (E_CLIENT (client), FALSE, NULL, memo_shell_sidebar_client_opened_cb, user_data);
+		g_clear_error (&error);
+		return;
+	}
 
 	/* Handle errors. */
-	switch (error ? error->code : E_CALENDAR_STATUS_OK) {
-		case E_CALENDAR_STATUS_OK:
+	switch ((error && error->domain == E_CLIENT_ERROR) ? error->code : -1) {
+		case -1:
 			break;
 
-		case E_CALENDAR_STATUS_AUTHENTICATION_FAILED:
-			e_cal_open_async (client, FALSE);
-			return;
-
-		case E_CALENDAR_STATUS_BUSY:
+		case E_CLIENT_ERROR_BUSY:
+			g_debug ("%s: Cannot open '%s', it's busy (%s)", G_STRFUNC, e_source_peek_name (e_client_get_source (E_CLIENT (client))), error->message);
+			g_clear_error (&error);
 			return;
 
-		case E_CALENDAR_STATUS_REPOSITORY_OFFLINE:
+		case E_CLIENT_ERROR_REPOSITORY_OFFLINE:
 			e_alert_submit (
 				E_ALERT_SINK (shell_content),
 				"calendar:prompt-no-contents-offline-memos",
@@ -198,7 +203,7 @@ memo_shell_sidebar_client_opened_cb (EMemoShellSidebar *memo_shell_sidebar,
 			/* fall through */
 
 		default:
-			if (error->code != E_CALENDAR_STATUS_REPOSITORY_OFFLINE) {
+			if (error->code != E_CLIENT_ERROR_REPOSITORY_OFFLINE) {
 				e_alert_submit (
 					E_ALERT_SINK (shell_content),
 					"calendar:failed-open-memos",
@@ -207,15 +212,12 @@ memo_shell_sidebar_client_opened_cb (EMemoShellSidebar *memo_shell_sidebar,
 
 			e_memo_shell_sidebar_remove_source (
 				memo_shell_sidebar,
-				e_cal_get_source (client));
+				e_client_get_source (E_CLIENT (client)));
+			g_clear_error (&error);
 			return;
 	}
 
-	g_assert (error == NULL);
-
-	g_signal_handlers_disconnect_matched (
-		client, G_SIGNAL_MATCH_FUNC, 0, 0, NULL,
-		memo_shell_sidebar_client_opened_cb, NULL);
+	g_clear_error (&error);
 
 	message = _("Loading memos");
 	memo_shell_sidebar_emit_status_message (memo_shell_sidebar, message);
@@ -224,27 +226,31 @@ memo_shell_sidebar_client_opened_cb (EMemoShellSidebar *memo_shell_sidebar,
 }
 
 static void
-memo_shell_sidebar_default_loaded_cb (ESource *source,
-                                      GAsyncResult *result,
-                                      EShellSidebar *shell_sidebar)
+memo_shell_sidebar_default_loaded_cb (GObject *source_object, GAsyncResult *result, gpointer user_data)
 {
+	EShellSidebar *shell_sidebar = user_data;
 	EMemoShellSidebarPrivate *priv;
 	EShellContent *shell_content;
 	EShellView *shell_view;
-	ECal *client;
+	EMemoShellContent *memo_shell_content;
+	ECalModel *model;
+	EClient *client = NULL;
 	GError *error = NULL;
 
 	priv = E_MEMO_SHELL_SIDEBAR (shell_sidebar)->priv;
 
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
+	memo_shell_content = E_MEMO_SHELL_CONTENT (shell_content);
+	model = e_memo_shell_content_get_memo_model (memo_shell_content);
 
-	client = e_load_cal_source_finish (source, result, &error);
+	if (!e_client_utils_open_new_finish (E_SOURCE (source_object), result, &client, &error))
+		client = NULL;
 
-	if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
+	if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED) ||
+	    g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_CANCELLED)) {
 		g_error_free (error);
 		goto exit;
-
 	} else if (error != NULL) {
 		e_alert_submit (
 			E_ALERT_SINK (shell_content),
@@ -254,16 +260,18 @@ memo_shell_sidebar_default_loaded_cb (ESource *source,
 		goto exit;
 	}
 
-	g_return_if_fail (E_IS_CAL (client));
+	g_return_if_fail (E_IS_CAL_CLIENT (client));
 
 	if (priv->default_client != NULL)
 		g_object_unref (priv->default_client);
 
-	priv->default_client = client;
+	priv->default_client = E_CAL_CLIENT (client);
+
+	e_cal_client_set_default_timezone (priv->default_client, e_cal_model_get_timezone (model));
 
 	g_object_notify (G_OBJECT (shell_sidebar), "default-client");
 
-exit:
+ exit:
 	g_object_unref (shell_sidebar);
 }
 
@@ -274,29 +282,18 @@ memo_shell_sidebar_set_default (EMemoShellSidebar *memo_shell_sidebar,
 	EMemoShellSidebarPrivate *priv;
 	EShellView *shell_view;
 	EShellWindow *shell_window;
-	EShellContent *shell_content;
 	EShellSidebar *shell_sidebar;
-	EMemoShellContent *memo_shell_content;
-	ECalSourceType source_type;
-	ECalModel *model;
-	ECal *client;
-	icaltimezone *timezone;
+	ECalClient *client;
 	const gchar *uid;
 
 	priv = memo_shell_sidebar->priv;
-	source_type = E_CAL_SOURCE_TYPE_JOURNAL;
 
 	/* FIXME Sidebar should not be accessing the EShellContent.
 	 *       This probably needs to be moved to EMemoShellView. */
 	shell_sidebar = E_SHELL_SIDEBAR (memo_shell_sidebar);
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
-	shell_content = e_shell_view_get_shell_content (shell_view);
 	shell_window = e_shell_view_get_shell_window (shell_view);
 
-	memo_shell_content = E_MEMO_SHELL_CONTENT (shell_content);
-	model = e_memo_shell_content_get_memo_model (memo_shell_content);
-	timezone = e_cal_model_get_timezone (model);
-
 	/* Cancel any unfinished previous request. */
 	if (priv->loading_default_client != NULL) {
 		g_cancellable_cancel (priv->loading_default_client);
@@ -319,11 +316,9 @@ memo_shell_sidebar_set_default (EMemoShellSidebar *memo_shell_sidebar,
 
 	priv->loading_default_client = g_cancellable_new ();
 
-	e_load_cal_source_async (
-		source, source_type, timezone,
-		GTK_WINDOW (shell_window), priv->loading_default_client,
-		(GAsyncReadyCallback) memo_shell_sidebar_default_loaded_cb,
-		g_object_ref (shell_sidebar));
+	e_client_utils_open_new (source, E_CLIENT_SOURCE_TYPE_MEMOS, FALSE, priv->loading_default_client,
+		e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+		memo_shell_sidebar_default_loaded_cb, g_object_ref (shell_sidebar));
 }
 
 static void
@@ -607,7 +602,7 @@ memo_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
 	source = e_source_selector_get_primary_selection (selector);
 
 	if (source != NULL) {
-		ECal *client;
+		ECalClient *client;
 		const gchar *uri;
 		const gchar *delete;
 
@@ -622,7 +617,7 @@ memo_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
 			memo_shell_sidebar->priv->client_table,
 			e_source_peek_uid (source));
 		refresh_supported =
-			client && e_cal_get_refresh_supported (client);
+			client && e_client_check_refresh_supported (E_CLIENT (client));
 	}
 
 	if (source != NULL)
@@ -639,7 +634,7 @@ memo_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
 
 static void
 memo_shell_sidebar_client_removed (EMemoShellSidebar *memo_shell_sidebar,
-                                   ECal *client)
+                                   ECalClient *client)
 {
 	ESourceSelector *selector;
 	GHashTable *client_table;
@@ -653,7 +648,7 @@ memo_shell_sidebar_client_removed (EMemoShellSidebar *memo_shell_sidebar,
 		client, G_SIGNAL_MATCH_DATA, 0, 0,
 		NULL, NULL, memo_shell_sidebar);
 
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 	uid = e_source_peek_uid (source);
 	g_return_if_fail (uid != NULL);
 
@@ -688,9 +683,9 @@ memo_shell_sidebar_class_init (EMemoShellSidebarClass *class)
 		PROP_DEFAULT_CLIENT,
 		g_param_spec_object (
 			"default-client",
-			"Default Memo Client",
+			"Default Memo ECalClient",
 			"Default client for memo operations",
-			E_TYPE_CAL,
+			E_TYPE_CAL_CLIENT,
 			G_PARAM_READABLE));
 
 	g_object_class_install_property (
@@ -711,7 +706,7 @@ memo_shell_sidebar_class_init (EMemoShellSidebarClass *class)
 		NULL, NULL,
 		g_cclosure_marshal_VOID__OBJECT,
 		G_TYPE_NONE, 1,
-		E_TYPE_CAL);
+		E_TYPE_CAL_CLIENT);
 
 	signals[CLIENT_REMOVED] = g_signal_new (
 		"client-removed",
@@ -721,7 +716,7 @@ memo_shell_sidebar_class_init (EMemoShellSidebarClass *class)
 		NULL, NULL,
 		g_cclosure_marshal_VOID__OBJECT,
 		G_TYPE_NONE, 1,
-		E_TYPE_CAL);
+		E_TYPE_CAL_CLIENT);
 
 	signals[STATUS_MESSAGE] = g_signal_new (
 		"status-message",
@@ -804,7 +799,7 @@ e_memo_shell_sidebar_get_clients (EMemoShellSidebar *memo_shell_sidebar)
 	return g_hash_table_get_values (client_table);
 }
 
-ECal *
+ECalClient *
 e_memo_shell_sidebar_get_default_client (EMemoShellSidebar *memo_shell_sidebar)
 {
 	g_return_val_if_fail (
@@ -830,12 +825,12 @@ e_memo_shell_sidebar_add_source (EMemoShellSidebar *memo_shell_sidebar,
 	EShellContent *shell_content;
 	EShellSidebar *shell_sidebar;
 	EMemoShellContent *memo_shell_content;
-	ECalSourceType source_type;
+	ECalClientSourceType source_type;
 	ESourceSelector *selector;
 	GHashTable *client_table;
 	ECalModel *model;
-	ECal *default_client;
-	ECal *client;
+	ECalClient *default_client;
+	ECalClient *client;
 	icaltimezone *timezone;
 	const gchar *uid;
 	const gchar *uri;
@@ -844,7 +839,7 @@ e_memo_shell_sidebar_add_source (EMemoShellSidebar *memo_shell_sidebar,
 	g_return_if_fail (E_IS_MEMO_SHELL_SIDEBAR (memo_shell_sidebar));
 	g_return_if_fail (E_IS_SOURCE (source));
 
-	source_type = E_CAL_SOURCE_TYPE_JOURNAL;
+	source_type = E_CAL_CLIENT_SOURCE_TYPE_MEMOS;
 	client_table = memo_shell_sidebar->priv->client_table;
 	default_client = memo_shell_sidebar->priv->default_client;
 	selector = e_memo_shell_sidebar_get_selector (memo_shell_sidebar);
@@ -859,15 +854,18 @@ e_memo_shell_sidebar_add_source (EMemoShellSidebar *memo_shell_sidebar,
 		ESource *default_source;
 		const gchar *default_uid;
 
-		default_source = e_cal_get_source (default_client);
+		default_source = e_client_get_source (E_CLIENT (default_client));
 		default_uid = e_source_peek_uid (default_source);
 
 		if (g_strcmp0 (uid, default_uid) == 0)
 			client = g_object_ref (default_client);
 	}
 
-	if (client == NULL)
-		client = e_auth_new_cal_from_source (source, source_type);
+	if (client == NULL) {
+		client = e_cal_client_new (source, source_type, NULL);
+		if (client)
+			g_signal_connect (client, "authenticate", G_CALLBACK (e_client_utils_authenticate_handler), NULL);
+	}
 
 	g_return_if_fail (client != NULL);
 
@@ -884,17 +882,12 @@ e_memo_shell_sidebar_add_source (EMemoShellSidebar *memo_shell_sidebar,
 	g_hash_table_insert (client_table, g_strdup (uid), client);
 	e_source_selector_select_source (selector, source);
 
-	uri = e_cal_get_uri (client);
+	uri = e_client_get_uri (E_CLIENT (client));
 	/* Translators: The string field is a URI. */
 	message = g_strdup_printf (_("Opening memos at %s"), uri);
 	memo_shell_sidebar_emit_status_message (memo_shell_sidebar, message);
 	g_free (message);
 
-	g_signal_connect_swapped (
-		client, "cal-opened-ex",
-		G_CALLBACK (memo_shell_sidebar_client_opened_cb),
-		memo_shell_sidebar);
-
 	/* FIXME Sidebar should not be accessing the EShellContent.
 	 *       This probably needs to be moved to EMemoShellView. */
 	shell_sidebar = E_SHELL_SIDEBAR (memo_shell_sidebar);
@@ -905,8 +898,8 @@ e_memo_shell_sidebar_add_source (EMemoShellSidebar *memo_shell_sidebar,
 	model = e_memo_shell_content_get_memo_model (memo_shell_content);
 	timezone = e_cal_model_get_timezone (model);
 
-	e_cal_set_default_timezone (client, timezone, NULL);
-	e_cal_open_async (client, FALSE);
+	e_cal_client_set_default_timezone (client, timezone);
+	e_client_open (E_CLIENT (client), FALSE, NULL, memo_shell_sidebar_client_opened_cb, memo_shell_sidebar);
 }
 
 void
@@ -914,7 +907,7 @@ e_memo_shell_sidebar_remove_source (EMemoShellSidebar *memo_shell_sidebar,
                                     ESource *source)
 {
 	GHashTable *client_table;
-	ECal *client;
+	ECalClient *client;
 	const gchar *uid;
 
 	g_return_if_fail (E_IS_MEMO_SHELL_SIDEBAR (memo_shell_sidebar));
diff --git a/modules/calendar/e-memo-shell-sidebar.h b/modules/calendar/e-memo-shell-sidebar.h
index 91e0ccc618..24e73f11d1 100644
--- a/modules/calendar/e-memo-shell-sidebar.h
+++ b/modules/calendar/e-memo-shell-sidebar.h
@@ -22,7 +22,7 @@
 #ifndef E_MEMO_SHELL_SIDEBAR_H
 #define E_MEMO_SHELL_SIDEBAR_H
 
-#include <libecal/e-cal.h>
+#include <libecal/e-cal-client.h>
 #include <libedataserverui/e-source-selector.h>
 
 #include <shell/e-shell-sidebar.h>
@@ -70,9 +70,9 @@ struct _EMemoShellSidebarClass {
 
 	/* Signals */
 	void	(*client_added)			(EMemoShellSidebar *memo_shell_sidebar,
-						 ECal *client);
+						 ECalClient *client);
 	void	(*client_removed)		(EMemoShellSidebar *memo_shell_sidebar,
-						 ECal *client);
+						 ECalClient *client);
 	void	(*status_message)		(EMemoShellSidebar *memo_shell_sidebar,
 						 const gchar *status_message,
 						 gdouble percent);
@@ -85,7 +85,7 @@ GtkWidget *	e_memo_shell_sidebar_new
 					(EShellView *shell_view);
 GList *		e_memo_shell_sidebar_get_clients
 					(EMemoShellSidebar *memo_shell_sidebar);
-ECal *		e_memo_shell_sidebar_get_default_client
+ECalClient *	e_memo_shell_sidebar_get_default_client
 					(EMemoShellSidebar *memo_shell_sidebar);
 ESourceSelector *
 		e_memo_shell_sidebar_get_selector
diff --git a/modules/calendar/e-memo-shell-view-actions.c b/modules/calendar/e-memo-shell-view-actions.c
index 593031235d..75d957c684 100644
--- a/modules/calendar/e-memo-shell-view-actions.c
+++ b/modules/calendar/e-memo-shell-view-actions.c
@@ -121,7 +121,7 @@ action_memo_list_copy_cb (GtkAction *action,
 
 	copy_source_dialog (
 		GTK_WINDOW (shell_window),
-		source, E_CAL_SOURCE_TYPE_JOURNAL);
+		source, E_CAL_CLIENT_SOURCE_TYPE_MEMOS);
 }
 
 static void
@@ -134,7 +134,7 @@ action_memo_list_delete_cb (GtkAction *action,
 	EShellWindow *shell_window;
 	EShellView *shell_view;
 	EMemoTable *memo_table;
-	ECal *client;
+	ECalClient *client;
 	ECalModel *model;
 	ESourceSelector *selector;
 	ESourceGroup *source_group;
@@ -170,14 +170,14 @@ action_memo_list_delete_cb (GtkAction *action,
 	uri = e_source_get_uri (source);
 	client = e_cal_model_get_client_for_uri (model, uri);
 	if (client == NULL)
-		client = e_cal_new_from_uri (uri, E_CAL_SOURCE_TYPE_JOURNAL);
+		client = e_cal_client_new_from_uri (uri, E_CAL_CLIENT_SOURCE_TYPE_MEMOS, NULL);
 	g_free (uri);
 
 	g_return_if_fail (client != NULL);
 
-	if (!e_cal_remove (client, &error)) {
-		g_warning ("%s", error->message);
-		g_error_free (error);
+	if (!e_client_remove_sync (E_CLIENT (client), NULL, &error)) {
+		g_debug ("%s: Failed to remove client: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		return;
 	}
 
@@ -191,8 +191,8 @@ action_memo_list_delete_cb (GtkAction *action,
 	e_source_group_remove_source (source_group, source);
 
 	if (!e_source_list_sync (source_list, &error)) {
-		g_warning ("%s", error->message);
-		g_error_free (error);
+		g_debug ("%s: Failed to sync source list: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 	}
 }
 
@@ -266,7 +266,7 @@ action_memo_list_refresh_cb (GtkAction *action,
 	EMemoShellContent *memo_shell_content;
 	EMemoShellSidebar *memo_shell_sidebar;
 	ESourceSelector *selector;
-	ECal *client;
+	ECalClient *client;
 	ECalModel *model;
 	ESource *source;
 	gchar *uri;
@@ -288,14 +288,11 @@ action_memo_list_refresh_cb (GtkAction *action,
 	if (client == NULL)
 		return;
 
-	g_return_if_fail (e_cal_get_refresh_supported (client));
+	g_return_if_fail (e_client_check_refresh_supported (E_CLIENT (client)));
 
-	if (!e_cal_refresh (client, &error) && error) {
-		g_warning (
-			"%s: Failed to refresh '%s', %s\n",
-			G_STRFUNC, e_source_peek_name (source),
-			error->message);
-		g_error_free (error);
+	if (!e_client_refresh_sync (E_CLIENT (client), NULL, &error)) {
+		g_debug ("%s: Failed to refresh '%s', %s", G_STRFUNC, e_source_peek_name (source), error ? error->message : "Unknown error");
+		g_clear_error (&error);
 	}
 }
 
@@ -338,7 +335,7 @@ action_memo_new_cb (GtkAction *action,
 	EShellWindow *shell_window;
 	EMemoShellContent *memo_shell_content;
 	EMemoTable *memo_table;
-	ECal *client;
+	ECalClient *client;
 	ECalComponent *comp;
 	CompEditor *editor;
 	GSList *list;
@@ -518,7 +515,7 @@ action_memo_save_as_cb (GtkAction *action,
 		return;
 
 	/* XXX We only save the first selected memo. */
-	string = e_cal_get_component_as_string (
+	string = e_cal_client_get_component_as_string (
 		comp_data->client, comp_data->icalcomp);
 	if (string == NULL) {
 		g_warning ("Could not convert memo to a string");
diff --git a/modules/calendar/e-memo-shell-view-private.c b/modules/calendar/e-memo-shell-view-private.c
index 36f09fd954..c1278cb46e 100644
--- a/modules/calendar/e-memo-shell-view-private.c
+++ b/modules/calendar/e-memo-shell-view-private.c
@@ -34,13 +34,13 @@ memo_shell_view_model_row_appended_cb (EMemoShellView *memo_shell_view,
                                        ECalModel *model)
 {
 	EMemoShellSidebar *memo_shell_sidebar;
-	ECal *client;
+	ECalClient *client;
 	ESource *source;
 
 	/* This is the "Click to Add" handler. */
 
 	client = e_cal_model_get_default_client (model);
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 
 	memo_shell_sidebar = memo_shell_view->priv->memo_shell_sidebar;
 	e_memo_shell_sidebar_add_source (memo_shell_sidebar, source);
@@ -58,7 +58,7 @@ memo_shell_view_table_popup_event_cb (EShellView *shell_view,
 
 static void
 memo_shell_view_selector_client_added_cb (EMemoShellView *memo_shell_view,
-                                          ECal *client)
+                                          ECalClient *client)
 {
 	EMemoShellContent *memo_shell_content;
 	EMemoTable *memo_table;
@@ -74,7 +74,7 @@ memo_shell_view_selector_client_added_cb (EMemoShellView *memo_shell_view,
 
 static void
 memo_shell_view_selector_client_removed_cb (EMemoShellView *memo_shell_view,
-                                            ECal *client)
+                                            ECalClient *client)
 {
 	EMemoShellContent *memo_shell_content;
 	EMemoTable *memo_table;
@@ -452,10 +452,10 @@ e_memo_shell_view_update_timezone (EMemoShellView *memo_shell_view)
 	clients = e_memo_shell_sidebar_get_clients (memo_shell_sidebar);
 
 	for (iter = clients; iter != NULL; iter = iter->next) {
-		ECal *client = iter->data;
+		ECalClient *client = iter->data;
 
-		if (e_cal_get_load_state (client) == E_CAL_LOAD_LOADED)
-			e_cal_set_default_timezone (client, timezone, NULL);
+		if (e_client_is_opened (E_CLIENT (client)))
+			e_cal_client_set_default_timezone (client, timezone);
 	}
 
 	g_list_free (clients);
diff --git a/modules/calendar/e-task-shell-backend.c b/modules/calendar/e-task-shell-backend.c
index b9f95b3a72..768f46fd28 100644
--- a/modules/calendar/e-task-shell-backend.c
+++ b/modules/calendar/e-task-shell-backend.c
@@ -27,17 +27,17 @@
 
 #include <string.h>
 #include <glib/gi18n.h>
-#include <libecal/e-cal.h>
+#include <libecal/e-cal-client.h>
 #include <libedataserver/e-url.h>
 #include <libedataserver/e-source.h>
 #include <libedataserver/e-source-list.h>
 #include <libedataserver/e-source-group.h>
+#include <libedataserverui/e-client-utils.h>
 
 #include "shell/e-shell.h"
 #include "shell/e-shell-backend.h"
 #include "shell/e-shell-window.h"
 
-#include "calendar/common/authentication.h"
 #include "calendar/gui/comp-util.h"
 #include "calendar/gui/dialogs/calendar-setup.h"
 #include "calendar/gui/dialogs/task-editor.h"
@@ -74,6 +74,7 @@ task_shell_backend_ensure_sources (EShellBackend *shell_backend)
 	GSList *sources, *iter;
 	const gchar *name;
 	gboolean save_list = FALSE;
+	GError *error = NULL;
 
 	on_this_computer = NULL;
 	personal = NULL;
@@ -83,10 +84,11 @@ task_shell_backend_ensure_sources (EShellBackend *shell_backend)
 	shell = e_shell_backend_get_shell (shell_backend);
 	shell_settings = e_shell_get_shell_settings (shell);
 
-	if (!e_cal_get_sources (
+	if (!e_cal_client_get_sources (
 		&task_shell_backend->priv->source_list,
-		E_CAL_SOURCE_TYPE_TODO, NULL)) {
-		g_warning ("Could not get task sources from GConf!");
+		E_CAL_CLIENT_SOURCE_TYPE_TASKS, &error)) {
+		g_debug ("%s: Could not get task sources: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		return;
 	}
 
@@ -164,42 +166,49 @@ task_shell_backend_new_task (ESource *source,
                              EShell *shell,
                              CompEditorFlags flags)
 {
-	ECal *cal;
+	EClient *client = NULL;
+	ECalClient *cal_client;
 	ECalComponent *comp;
 	CompEditor *editor;
+	GError *error = NULL;
+
+	if (!e_client_utils_open_new_finish (source, result, &client, &error))
+		client = NULL;
 
 	/* XXX Handle errors better. */
-	cal = e_load_cal_source_finish (source, result, NULL);
-	g_return_if_fail (E_IS_CAL (cal));
+	if (!client) {
+		g_debug ("%s: Failed to open '%s': %s", G_STRFUNC, e_source_peek_name (source), error ? error->message : "Unknown error");
+		g_clear_error (&error);
+		return;
+	}
 
-	editor = task_editor_new (cal, shell, flags);
-	comp = cal_comp_task_new_with_defaults (cal);
+	g_return_if_fail (E_IS_CAL_CLIENT (client));
+
+	cal_client = E_CAL_CLIENT (client);
+	editor = task_editor_new (cal_client, shell, flags);
+	comp = cal_comp_task_new_with_defaults (cal_client);
 	comp_editor_edit_comp (editor, comp);
 
 	gtk_window_present (GTK_WINDOW (editor));
 
 	g_object_unref (comp);
-	g_object_unref (cal);
+	g_object_unref (client);
 }
 
 static void
-task_shell_backend_task_new_cb (ESource *source,
-                                GAsyncResult *result,
-                                EShell *shell)
+task_shell_backend_task_new_cb (GObject *source_object, GAsyncResult *result, gpointer shell)
 {
 	CompEditorFlags flags = 0;
 
 	flags |= COMP_EDITOR_NEW_ITEM;
 
-	task_shell_backend_new_task (source, result, shell, flags);
+	task_shell_backend_new_task (E_SOURCE (source_object), result, shell, flags);
 
 	g_object_unref (shell);
 }
 
 static void
-task_shell_backend_task_assigned_new_cb (ESource *source,
-                                         GAsyncResult *result,
-                                         EShell *shell)
+task_shell_backend_task_assigned_new_cb (GObject *source_object, GAsyncResult *result, gpointer shell)
 {
 	CompEditorFlags flags = 0;
 
@@ -207,7 +216,7 @@ task_shell_backend_task_assigned_new_cb (ESource *source,
 	flags |= COMP_EDITOR_IS_ASSIGNED;
 	flags |= COMP_EDITOR_USER_ORG;
 
-	task_shell_backend_new_task (source, result, shell, flags);
+	task_shell_backend_new_task (E_SOURCE (source_object), result, shell, flags);
 
 	g_object_unref (shell);
 }
@@ -221,14 +230,11 @@ action_task_new_cb (GtkAction *action,
 	EShellSettings *shell_settings;
 	ESource *source = NULL;
 	ESourceList *source_list;
-	ECalSourceType source_type;
 	const gchar *action_name;
 	gchar *uid;
 
 	/* This callback is used for both tasks and assigned tasks. */
 
-	source_type = E_CAL_SOURCE_TYPE_TODO;
-
 	shell = e_shell_window_get_shell (shell_window);
 	shell_settings = e_shell_get_shell_settings (shell);
 	shell_backend = e_shell_get_backend_by_name (shell, "tasks");
@@ -253,19 +259,13 @@ action_task_new_cb (GtkAction *action,
 	 * FIXME Need to obtain a better default time zone. */
 	action_name = gtk_action_get_name (action);
 	if (strcmp (action_name, "task-assigned-new") == 0)
-		e_load_cal_source_async (
-			source, source_type, NULL,
-			GTK_WINDOW (shell_window),
-			NULL, (GAsyncReadyCallback)
-			task_shell_backend_task_assigned_new_cb,
-			g_object_ref (shell));
+		e_client_utils_open_new (source, E_CLIENT_SOURCE_TYPE_TASKS, FALSE, NULL,
+			e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+			task_shell_backend_task_assigned_new_cb, g_object_ref (shell));
 	else
-		e_load_cal_source_async (
-			source, source_type, NULL,
-			GTK_WINDOW (shell_window),
-			NULL, (GAsyncReadyCallback)
-			task_shell_backend_task_new_cb,
-			g_object_ref (shell));
+		e_client_utils_open_new (source, E_CLIENT_SOURCE_TYPE_TASKS, FALSE, NULL,
+			e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+			task_shell_backend_task_new_cb, g_object_ref (shell));
 
 	g_object_unref (source_list);
 }
@@ -311,11 +311,11 @@ task_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	EShell *shell;
 	CompEditor *editor;
 	CompEditorFlags flags = 0;
-	ECal *client;
+	ECalClient *client;
 	ECalComponent *comp;
 	ESource *source;
 	ESourceList *source_list;
-	ECalSourceType source_type;
+	ECalClientSourceType source_type;
 	EUri *euri;
 	icalcomponent *icalcomp;
 	icalproperty *icalprop;
@@ -326,7 +326,7 @@ task_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	gboolean handled = FALSE;
 	GError *error = NULL;
 
-	source_type = E_CAL_SOURCE_TYPE_TODO;
+	source_type = E_CAL_CLIENT_SOURCE_TYPE_TASKS;
 	shell = e_shell_backend_get_shell (shell_backend);
 
 	if (strncmp (uri, "task:", 5) != 0)
@@ -379,8 +379,9 @@ task_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	 * we successfully open it is another matter... */
 	handled = TRUE;
 
-	if (!e_cal_get_sources (&source_list, source_type, NULL)) {
-		g_printerr ("Could not get task sources from GConf!\n");
+	if (!e_cal_client_get_sources (&source_list, source_type, &error)) {
+		g_debug ("%s: Could not get task sources: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		goto exit;
 	}
 
@@ -391,12 +392,13 @@ task_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 		goto exit;
 	}
 
-	client = e_auth_new_cal_from_source (source, source_type);
-	if (client == NULL || !e_cal_open (client, TRUE, &error)) {
-		if (error != NULL) {
-			g_printerr ("%s\n", error->message);
-			g_error_free (error);
-		}
+	client = e_cal_client_new (source, source_type, &error);
+	if (client)
+		g_signal_connect (client, "authenticate", G_CALLBACK (e_client_utils_authenticate_handler), NULL);
+
+	if (client == NULL || !e_client_open_sync (E_CLIENT (client), TRUE, NULL, &error)) {
+		g_debug ("%s: Failed to create/open client: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		g_object_unref (source_list);
 		goto exit;
 	}
@@ -409,8 +411,8 @@ task_shell_backend_handle_uri_cb (EShellBackend *shell_backend,
 	if (editor != NULL)
 		goto present;
 
-	if (!e_cal_get_object (client, comp_uid, comp_rid, &icalcomp, &error)) {
-		g_printerr ("%s\n", error->message);
+	if (!e_cal_client_get_object_sync (client, comp_uid, comp_rid, &icalcomp, NULL, &error)) {
+		g_debug ("%s: Failed to get object: %s", G_STRFUNC, error ? error->message : "Unknown error");
 		g_object_unref (source_list);
 		g_error_free (error);
 		goto exit;
diff --git a/modules/calendar/e-task-shell-content.c b/modules/calendar/e-task-shell-content.c
index 0ffa6fb5a3..743bb937e7 100644
--- a/modules/calendar/e-task-shell-content.c
+++ b/modules/calendar/e-task-shell-content.c
@@ -115,7 +115,7 @@ task_shell_content_table_foreach_cb (gint model_row,
 		ESource *source;
 		const gchar *source_uid;
 
-		source = e_cal_get_source (comp_data->client);
+		source = e_client_get_source (E_CLIENT (comp_data->client));
 		source_uid = e_source_peek_uid (source);
 
 		foreach_data->list = g_slist_prepend (
@@ -577,15 +577,15 @@ task_shell_content_check_state (EShellContent *shell_content)
 		const gchar *cap;
 		gboolean read_only;
 
-		e_cal_is_read_only (comp_data->client, &read_only, NULL);
+		read_only = e_client_is_readonly (E_CLIENT (comp_data->client));
 		editable &= !read_only;
 
 		cap = CAL_STATIC_CAPABILITY_NO_TASK_ASSIGNMENT;
-		if (e_cal_get_static_capability (comp_data->client, cap))
+		if (e_client_check_capability (E_CLIENT (comp_data->client), cap))
 			assignable = FALSE;
 
 		cap = CAL_STATIC_CAPABILITY_NO_CONV_TO_ASSIGN_TASK;
-		if (e_cal_get_static_capability (comp_data->client, cap))
+		if (e_client_check_capability (E_CLIENT (comp_data->client), cap))
 			assignable = FALSE;
 
 		prop = icalcomponent_get_first_property (
diff --git a/modules/calendar/e-task-shell-sidebar.c b/modules/calendar/e-task-shell-sidebar.c
index 098726af22..b37ab6dec6 100644
--- a/modules/calendar/e-task-shell-sidebar.c
+++ b/modules/calendar/e-task-shell-sidebar.c
@@ -27,11 +27,11 @@
 
 #include <string.h>
 #include <glib/gi18n.h>
-#include <libecal/e-cal.h>
+#include <libecal/e-cal-client.h>
+#include <libedataserverui/e-client-utils.h>
 
 #include "e-util/e-alert-dialog.h"
 #include "e-util/e-util.h"
-#include "calendar/common/authentication.h"
 #include "calendar/gui/e-task-list-selector.h"
 #include "calendar/gui/misc.h"
 
@@ -52,7 +52,7 @@ struct _ETaskShellSidebarPrivate {
 	 * opened.  So the user first highlights a source, then
 	 * sometime later we update our default-client property
 	 * which is bound by an EBinding to ECalModel. */
-	ECal *default_client;
+	ECalClient *default_client;
 
 	GCancellable *loading_default_client;
 };
@@ -76,7 +76,7 @@ static GType task_shell_sidebar_type;
 
 static void
 task_shell_sidebar_emit_client_added (ETaskShellSidebar *task_shell_sidebar,
-                                      ECal *client)
+                                      ECalClient *client)
 {
 	guint signal_id = signals[CLIENT_ADDED];
 
@@ -85,7 +85,7 @@ task_shell_sidebar_emit_client_added (ETaskShellSidebar *task_shell_sidebar,
 
 static void
 task_shell_sidebar_emit_client_removed (ETaskShellSidebar *task_shell_sidebar,
-                                        ECal *client)
+                                        ECalClient *client)
 {
 	guint signal_id = signals[CLIENT_REMOVED];
 
@@ -103,7 +103,7 @@ task_shell_sidebar_emit_status_message (ETaskShellSidebar *task_shell_sidebar,
 
 static void
 task_shell_sidebar_backend_died_cb (ETaskShellSidebar *task_shell_sidebar,
-                                    ECal *client)
+                                    ECalClient *client)
 {
 	EShellView *shell_view;
 	EShellContent *shell_content;
@@ -118,7 +118,7 @@ task_shell_sidebar_backend_died_cb (ETaskShellSidebar *task_shell_sidebar,
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
 
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 	uid = e_source_peek_uid (source);
 
 	g_object_ref (source);
@@ -136,7 +136,7 @@ task_shell_sidebar_backend_died_cb (ETaskShellSidebar *task_shell_sidebar,
 static void
 task_shell_sidebar_backend_error_cb (ETaskShellSidebar *task_shell_sidebar,
                                      const gchar *message,
-                                     ECal *client)
+                                     ECalClient *client)
 {
 	EShellView *shell_view;
 	EShellContent *shell_content;
@@ -148,7 +148,7 @@ task_shell_sidebar_backend_error_cb (ETaskShellSidebar *task_shell_sidebar,
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
 
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 	source_group = e_source_peek_group (source);
 
 	e_alert_submit (
@@ -159,38 +159,43 @@ task_shell_sidebar_backend_error_cb (ETaskShellSidebar *task_shell_sidebar,
 }
 
 static void
-task_shell_sidebar_client_opened_cb (ETaskShellSidebar *task_shell_sidebar,
-                                     const GError *error,
-                                     ECal *client)
+task_shell_sidebar_client_opened_cb (GObject *source_object, GAsyncResult *result, gpointer user_data)
 {
+	ECalClient *client = E_CAL_CLIENT (source_object);
+	ETaskShellSidebar *task_shell_sidebar = user_data;
 	EShellView *shell_view;
 	EShellContent *shell_content;
 	EShellSidebar *shell_sidebar;
 	const gchar *message;
+	GError *error = NULL;
 
 	shell_sidebar = E_SHELL_SIDEBAR (task_shell_sidebar);
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
 
-	if (g_error_matches (error, E_CALENDAR_ERROR,
-		E_CALENDAR_STATUS_AUTHENTICATION_FAILED) ||
-	    g_error_matches (error, E_CALENDAR_ERROR,
-		E_CALENDAR_STATUS_AUTHENTICATION_REQUIRED))
-		e_auth_cal_forget_password (client);
+	e_client_open_finish (E_CLIENT (client), result, &error);
+
+	if (g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_AUTHENTICATION_FAILED) ||
+	    g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_AUTHENTICATION_REQUIRED))
+		e_client_utils_forget_password (E_CLIENT (client));
+
+	if (g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_AUTHENTICATION_FAILED)) {
+		e_client_open (E_CLIENT (client), FALSE, NULL, task_shell_sidebar_client_opened_cb, user_data);
+		g_clear_error (&error);
+		return;
+	}
 
 	/* Handle errors. */
-	switch (error ? error->code : E_CALENDAR_STATUS_OK) {
-		case E_CALENDAR_STATUS_OK:
+	switch ((error && error->domain == E_CLIENT_ERROR) ? error->code : -1) {
+		case -1:
 			break;
 
-		case E_CALENDAR_STATUS_AUTHENTICATION_FAILED:
-			e_cal_open_async (client, FALSE);
-			return;
-
-		case E_CALENDAR_STATUS_BUSY:
+		case E_CLIENT_ERROR_BUSY:
+			g_debug ("%s: Cannot open '%s', it's busy (%s)", G_STRFUNC, e_source_peek_name (e_client_get_source (E_CLIENT (client))), error->message);
+			g_clear_error (&error);
 			return;
 
-		case E_CALENDAR_STATUS_REPOSITORY_OFFLINE:
+		case E_CLIENT_ERROR_REPOSITORY_OFFLINE:
 			e_alert_submit (
 				E_ALERT_SINK (shell_content),
 				"calendar:prompt-no-contents-offline-tasks",
@@ -198,7 +203,7 @@ task_shell_sidebar_client_opened_cb (ETaskShellSidebar *task_shell_sidebar,
 			/* fall through */
 
 		default:
-			if (error->code != E_CALENDAR_STATUS_REPOSITORY_OFFLINE) {
+			if (error->code != E_CLIENT_ERROR_REPOSITORY_OFFLINE) {
 				e_alert_submit (
 					E_ALERT_SINK (shell_content),
 					"calendar:failed-open-tasks",
@@ -207,15 +212,12 @@ task_shell_sidebar_client_opened_cb (ETaskShellSidebar *task_shell_sidebar,
 
 			e_task_shell_sidebar_remove_source (
 				task_shell_sidebar,
-				e_cal_get_source (client));
+				e_client_get_source (E_CLIENT (client)));
+			g_clear_error (&error);
 			return;
 	}
 
-	g_assert (error == NULL);
-
-	g_signal_handlers_disconnect_matched (
-		client, G_SIGNAL_MATCH_FUNC, 0, 0, NULL,
-		task_shell_sidebar_client_opened_cb, NULL);
+	g_clear_error (&error);
 
 	message = _("Loading tasks");
 	task_shell_sidebar_emit_status_message (task_shell_sidebar, message);
@@ -224,27 +226,31 @@ task_shell_sidebar_client_opened_cb (ETaskShellSidebar *task_shell_sidebar,
 }
 
 static void
-task_shell_sidebar_default_loaded_cb (ESource *source,
-                                      GAsyncResult *result,
-                                      EShellSidebar *shell_sidebar)
+task_shell_sidebar_default_loaded_cb (GObject *source_object, GAsyncResult *result, gpointer user_data)
 {
+	EShellSidebar *shell_sidebar = user_data;
 	ETaskShellSidebarPrivate *priv;
 	EShellContent *shell_content;
 	EShellView *shell_view;
-	ECal *client;
+	ETaskShellContent *task_shell_content;
+	ECalModel *model;
+	EClient *client = NULL;
 	GError *error = NULL;
 
 	priv = E_TASK_SHELL_SIDEBAR (shell_sidebar)->priv;
 
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
 	shell_content = e_shell_view_get_shell_content (shell_view);
+	task_shell_content = E_TASK_SHELL_CONTENT (shell_content);
+	model = e_task_shell_content_get_task_model (task_shell_content);
 
-	client = e_load_cal_source_finish (source, result, &error);
+	if (!e_client_utils_open_new_finish (E_SOURCE (source_object), result, &client, &error))
+		client = NULL;
 
-	if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
+	if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED) ||
+	    g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_CANCELLED)) {
 		g_error_free (error);
 		goto exit;
-
 	} else if (error != NULL) {
 		e_alert_submit (
 			E_ALERT_SINK (shell_content),
@@ -254,16 +260,18 @@ task_shell_sidebar_default_loaded_cb (ESource *source,
 		goto exit;
 	}
 
-	g_return_if_fail (E_IS_CAL (client));
+	g_return_if_fail (E_IS_CAL_CLIENT (client));
 
 	if (priv->default_client != NULL)
 		g_object_unref (priv->default_client);
 
-	priv->default_client = client;
+	priv->default_client = E_CAL_CLIENT (client);
+
+	e_cal_client_set_default_timezone (priv->default_client, e_cal_model_get_timezone (model));
 
 	g_object_notify (G_OBJECT (shell_sidebar), "default-client");
 
-exit:
+ exit:
 	g_object_unref (shell_sidebar);
 }
 
@@ -274,29 +282,18 @@ task_shell_sidebar_set_default (ETaskShellSidebar *task_shell_sidebar,
 	ETaskShellSidebarPrivate *priv;
 	EShellView *shell_view;
 	EShellWindow *shell_window;
-	EShellContent *shell_content;
 	EShellSidebar *shell_sidebar;
-	ETaskShellContent *task_shell_content;
-	ECalSourceType source_type;
-	ECalModel *model;
-	ECal *client;
-	icaltimezone *timezone;
+	ECalClient *client;
 	const gchar *uid;
 
 	priv = task_shell_sidebar->priv;
-	source_type = E_CAL_SOURCE_TYPE_TODO;
 
 	/* FIXME Sidebar should not be accessing the EShellContent.
 	 *       This probably needs to be moved to ETaskShellView. */
 	shell_sidebar = E_SHELL_SIDEBAR (task_shell_sidebar);
 	shell_view = e_shell_sidebar_get_shell_view (shell_sidebar);
-	shell_content = e_shell_view_get_shell_content (shell_view);
 	shell_window = e_shell_view_get_shell_window (shell_view);
 
-	task_shell_content = E_TASK_SHELL_CONTENT (shell_content);
-	model = e_task_shell_content_get_task_model (task_shell_content);
-	timezone = e_cal_model_get_timezone (model);
-
 	/* Cancel any unfinished previous request. */
 	if (priv->loading_default_client != NULL) {
 		g_cancellable_cancel (priv->loading_default_client);
@@ -319,11 +316,9 @@ task_shell_sidebar_set_default (ETaskShellSidebar *task_shell_sidebar,
 
 	priv->loading_default_client = g_cancellable_new ();
 
-	e_load_cal_source_async (
-		source, source_type, timezone,
-		GTK_WINDOW (shell_window), priv->loading_default_client,
-		(GAsyncReadyCallback) task_shell_sidebar_default_loaded_cb,
-		g_object_ref (shell_sidebar));
+	e_client_utils_open_new (source, E_CLIENT_SOURCE_TYPE_TASKS, FALSE, priv->loading_default_client,
+		e_client_utils_authenticate_handler, GTK_WINDOW (shell_window),
+		task_shell_sidebar_default_loaded_cb, g_object_ref (shell_sidebar));
 }
 
 static void
@@ -607,22 +602,22 @@ task_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
 	source = e_source_selector_get_primary_selection (selector);
 
 	if (source != NULL) {
-		ECal *client;
+		ECalClient *client;
 		const gchar *uri;
-		const gchar *delete;
+		const gchar *delete_prop;
 
 		uri = e_source_peek_relative_uri (source);
 		is_system = (uri == NULL || strcmp (uri, "system") == 0);
 
 		can_delete = !is_system;
-		delete = e_source_get_property (source, "delete");
-		can_delete &= (delete == NULL || strcmp (delete, "no") != 0);
+		delete_prop = e_source_get_property (source, "delete");
+		can_delete = can_delete && (delete_prop == NULL || strcmp (delete_prop, "no") != 0);
 
 		client = g_hash_table_lookup (
 			task_shell_sidebar->priv->client_table,
 			e_source_peek_uid (source));
 		refresh_supported =
-			client && e_cal_get_refresh_supported (client);
+			client && e_client_check_refresh_supported (E_CLIENT (client));
 	}
 
 	if (source != NULL)
@@ -639,7 +634,7 @@ task_shell_sidebar_check_state (EShellSidebar *shell_sidebar)
 
 static void
 task_shell_sidebar_client_removed (ETaskShellSidebar *task_shell_sidebar,
-                                   ECal *client)
+                                   ECalClient *client)
 {
 	ESourceSelector *selector;
 	GHashTable *client_table;
@@ -653,7 +648,7 @@ task_shell_sidebar_client_removed (ETaskShellSidebar *task_shell_sidebar,
 		client, G_SIGNAL_MATCH_DATA, 0, 0,
 		NULL, NULL, task_shell_sidebar);
 
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 	uid = e_source_peek_uid (source);
 	g_return_if_fail (uid != NULL);
 
@@ -688,9 +683,9 @@ task_shell_sidebar_class_init (ETaskShellSidebarClass *class)
 		PROP_DEFAULT_CLIENT,
 		g_param_spec_object (
 			"default-client",
-			"Default Task Client",
+			"Default Task ECalClient",
 			"Default client for task operations",
-			E_TYPE_CAL,
+			E_TYPE_CAL_CLIENT,
 			G_PARAM_READABLE));
 
 	g_object_class_install_property (
@@ -711,7 +706,7 @@ task_shell_sidebar_class_init (ETaskShellSidebarClass *class)
 		NULL, NULL,
 		g_cclosure_marshal_VOID__OBJECT,
 		G_TYPE_NONE, 1,
-		E_TYPE_CAL);
+		E_TYPE_CAL_CLIENT);
 
 	signals[CLIENT_REMOVED] = g_signal_new (
 		"client-removed",
@@ -721,7 +716,7 @@ task_shell_sidebar_class_init (ETaskShellSidebarClass *class)
 		NULL, NULL,
 		g_cclosure_marshal_VOID__OBJECT,
 		G_TYPE_NONE, 1,
-		E_TYPE_CAL);
+		E_TYPE_CAL_CLIENT);
 
 	signals[STATUS_MESSAGE] = g_signal_new (
 		"status-message",
@@ -804,7 +799,7 @@ e_task_shell_sidebar_get_clients (ETaskShellSidebar *task_shell_sidebar)
 	return g_hash_table_get_values (client_table);
 }
 
-ECal *
+ECalClient *
 e_task_shell_sidebar_get_default_client (ETaskShellSidebar *task_shell_sidebar)
 {
 	g_return_val_if_fail (
@@ -830,12 +825,12 @@ e_task_shell_sidebar_add_source (ETaskShellSidebar *task_shell_sidebar,
 	EShellContent *shell_content;
 	EShellSidebar *shell_sidebar;
 	ETaskShellContent *task_shell_content;
-	ECalSourceType source_type;
+	ECalClientSourceType source_type;
 	ESourceSelector *selector;
 	GHashTable *client_table;
 	ECalModel *model;
-	ECal *default_client;
-	ECal *client;
+	ECalClient *default_client;
+	ECalClient *client;
 	icaltimezone *timezone;
 	const gchar *uid;
 	const gchar *uri;
@@ -844,7 +839,7 @@ e_task_shell_sidebar_add_source (ETaskShellSidebar *task_shell_sidebar,
 	g_return_if_fail (E_IS_TASK_SHELL_SIDEBAR (task_shell_sidebar));
 	g_return_if_fail (E_IS_SOURCE (source));
 
-	source_type = E_CAL_SOURCE_TYPE_TODO;
+	source_type = E_CAL_CLIENT_SOURCE_TYPE_TASKS;
 	client_table = task_shell_sidebar->priv->client_table;
 	default_client = task_shell_sidebar->priv->default_client;
 	selector = e_task_shell_sidebar_get_selector (task_shell_sidebar);
@@ -859,15 +854,18 @@ e_task_shell_sidebar_add_source (ETaskShellSidebar *task_shell_sidebar,
 		ESource *default_source;
 		const gchar *default_uid;
 
-		default_source = e_cal_get_source (default_client);
+		default_source = e_client_get_source (E_CLIENT (default_client));
 		default_uid = e_source_peek_uid (default_source);
 
 		if (g_strcmp0 (uid, default_uid) == 0)
 			client = g_object_ref (default_client);
 	}
 
-	if (client == NULL)
-		client = e_auth_new_cal_from_source (source, source_type);
+	if (client == NULL) {
+		client = e_cal_client_new (source, source_type, NULL);
+		if (client)
+			g_signal_connect (client, "authenticate", G_CALLBACK (e_client_utils_authenticate_handler), NULL);
+	}
 
 	g_return_if_fail (client != NULL);
 
@@ -884,17 +882,12 @@ e_task_shell_sidebar_add_source (ETaskShellSidebar *task_shell_sidebar,
 	g_hash_table_insert (client_table, g_strdup (uid), client);
 	e_source_selector_select_source (selector, source);
 
-	uri = e_cal_get_uri (client);
+	uri = e_client_get_uri (E_CLIENT (client));
 	/* Translators: The string field is a URI. */
 	message = g_strdup_printf (_("Opening tasks at %s"), uri);
 	task_shell_sidebar_emit_status_message (task_shell_sidebar, message);
 	g_free (message);
 
-	g_signal_connect_swapped (
-		client, "cal-opened-ex",
-		G_CALLBACK (task_shell_sidebar_client_opened_cb),
-		task_shell_sidebar);
-
 	/* FIXME Sidebar should not be accessing the EShellContent.
 	 *       This probably needs to be moved to ETaskShellView. */
 	shell_sidebar = E_SHELL_SIDEBAR (task_shell_sidebar);
@@ -905,8 +898,8 @@ e_task_shell_sidebar_add_source (ETaskShellSidebar *task_shell_sidebar,
 	model = e_task_shell_content_get_task_model (task_shell_content);
 	timezone = e_cal_model_get_timezone (model);
 
-	e_cal_set_default_timezone (client, timezone, NULL);
-	e_cal_open_async (client, FALSE);
+	e_cal_client_set_default_timezone (client, timezone);
+	e_client_open (E_CLIENT (client), FALSE, NULL, task_shell_sidebar_client_opened_cb, task_shell_sidebar);
 }
 
 void
@@ -914,7 +907,7 @@ e_task_shell_sidebar_remove_source (ETaskShellSidebar *task_shell_sidebar,
                                     ESource *source)
 {
 	GHashTable *client_table;
-	ECal *client;
+	ECalClient *client;
 	const gchar *uid;
 
 	g_return_if_fail (E_IS_TASK_SHELL_SIDEBAR (task_shell_sidebar));
diff --git a/modules/calendar/e-task-shell-sidebar.h b/modules/calendar/e-task-shell-sidebar.h
index 17e50f8239..24c64cf2af 100644
--- a/modules/calendar/e-task-shell-sidebar.h
+++ b/modules/calendar/e-task-shell-sidebar.h
@@ -22,7 +22,7 @@
 #ifndef E_TASK_SHELL_SIDEBAR_H
 #define E_TASK_SHELL_SIDEBAR_H
 
-#include <libecal/e-cal.h>
+#include <libecal/e-cal-client.h>
 #include <libedataserverui/e-source-selector.h>
 
 #include <shell/e-shell-sidebar.h>
@@ -70,9 +70,9 @@ struct _ETaskShellSidebarClass {
 
 	/* Signals */
 	void	(*client_added)			(ETaskShellSidebar *task_shell_sidebar,
-						 ECal *client);
+						 ECalClient *client);
 	void	(*client_removed)		(ETaskShellSidebar *task_shell_sidebar,
-						 ECal *client);
+						 ECalClient *client);
 	void	(*status_message)		(ETaskShellSidebar *task_shell_sidebar,
 						 const gchar *status_message,
 						 gdouble percent);
@@ -85,7 +85,7 @@ GtkWidget *	e_task_shell_sidebar_new
 					(EShellView *shell_view);
 GList *		e_task_shell_sidebar_get_clients
 					(ETaskShellSidebar *task_shell_sidebar);
-ECal *		e_task_shell_sidebar_get_default_client
+ECalClient *		e_task_shell_sidebar_get_default_client
 					(ETaskShellSidebar *task_shell_sidebar);
 ESourceSelector *
 		e_task_shell_sidebar_get_selector
diff --git a/modules/calendar/e-task-shell-view-actions.c b/modules/calendar/e-task-shell-view-actions.c
index 297120e29c..4938452309 100644
--- a/modules/calendar/e-task-shell-view-actions.c
+++ b/modules/calendar/e-task-shell-view-actions.c
@@ -144,7 +144,7 @@ action_task_list_copy_cb (GtkAction *action,
 
 	copy_source_dialog (
 		GTK_WINDOW (shell_window),
-		source, E_CAL_SOURCE_TYPE_TODO);
+		source, E_CAL_CLIENT_SOURCE_TYPE_TASKS);
 }
 
 static void
@@ -157,7 +157,7 @@ action_task_list_delete_cb (GtkAction *action,
 	EShellWindow *shell_window;
 	EShellView *shell_view;
 	ETaskTable *task_table;
-	ECal *client;
+	ECalClient *client;
 	ECalModel *model;
 	ESourceSelector *selector;
 	ESourceGroup *source_group;
@@ -193,14 +193,14 @@ action_task_list_delete_cb (GtkAction *action,
 	uri = e_source_get_uri (source);
 	client = e_cal_model_get_client_for_uri (model, uri);
 	if (client == NULL)
-		client = e_cal_new_from_uri (uri, E_CAL_SOURCE_TYPE_JOURNAL);
+		client = e_cal_client_new_from_uri (uri, E_CAL_CLIENT_SOURCE_TYPE_MEMOS, NULL);
 	g_free (uri);
 
 	g_return_if_fail (client != NULL);
 
-	if (!e_cal_remove (client, &error)) {
-		g_warning ("%s", error->message);
-		g_error_free (error);
+	if (!e_client_remove_sync (E_CLIENT (client), NULL, &error)) {
+		g_debug ("%s: Failed to remove client: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 		return;
 	}
 
@@ -214,8 +214,8 @@ action_task_list_delete_cb (GtkAction *action,
 	e_source_group_remove_source (source_group, source);
 
 	if (!e_source_list_sync (source_list, &error)) {
-		g_warning ("%s", error->message);
-		g_error_free (error);
+		g_debug ("%s: Failed to sync srouce list: %s", G_STRFUNC, error ? error->message : "Unknown error");
+		g_clear_error (&error);
 	}
 }
 
@@ -289,7 +289,7 @@ action_task_list_refresh_cb (GtkAction *action,
 	ETaskShellContent *task_shell_content;
 	ETaskShellSidebar *task_shell_sidebar;
 	ESourceSelector *selector;
-	ECal *client;
+	ECalClient *client;
 	ECalModel *model;
 	ESource *source;
 	gchar *uri;
@@ -311,14 +311,11 @@ action_task_list_refresh_cb (GtkAction *action,
 	if (client == NULL)
 		return;
 
-	g_return_if_fail (e_cal_get_refresh_supported (client));
+	g_return_if_fail (e_client_check_refresh_supported (E_CLIENT (client)));
 
-	if (!e_cal_refresh (client, &error) && error) {
-		g_warning (
-			"%s: Failed to refresh '%s', %s\n",
-			G_STRFUNC, e_source_peek_name (source),
-			error->message);
-		g_error_free (error);
+	if (!e_client_refresh_sync (E_CLIENT (client), NULL, &error)) {
+		g_debug ("%s: Failed to refresh '%s', %s", G_STRFUNC, e_source_peek_name (source), error ? error->message : "Unknown error");
+		g_clear_error (&error);
 	}
 }
 
@@ -407,7 +404,7 @@ action_task_new_cb (GtkAction *action,
 	EShellWindow *shell_window;
 	ETaskShellContent *task_shell_content;
 	ETaskTable *task_table;
-	ECal *client;
+	ECalClient *client;
 	ECalComponent *comp;
 	CompEditor *editor;
 	GSList *list;
@@ -635,7 +632,7 @@ action_task_save_as_cb (GtkAction *action,
 		return;
 
 	/* XXX We only save the first selected task. */
-	string = e_cal_get_component_as_string (
+	string = e_cal_client_get_component_as_string (
 		comp_data->client, comp_data->icalcomp);
 	if (string == NULL) {
 		g_warning ("Could not convert task to a string");
diff --git a/modules/calendar/e-task-shell-view-private.c b/modules/calendar/e-task-shell-view-private.c
index 0ce8339849..77e4beae1e 100644
--- a/modules/calendar/e-task-shell-view-private.c
+++ b/modules/calendar/e-task-shell-view-private.c
@@ -34,13 +34,13 @@ task_shell_view_model_row_appended_cb (ETaskShellView *task_shell_view,
                                        ECalModel *model)
 {
 	ETaskShellSidebar *task_shell_sidebar;
-	ECal *client;
+	ECalClient *client;
 	ESource *source;
 
 	/* This is the "Click to Add" handler. */
 
 	client = e_cal_model_get_default_client (model);
-	source = e_cal_get_source (client);
+	source = e_client_get_source (E_CLIENT (client));
 
 	task_shell_sidebar = task_shell_view->priv->task_shell_sidebar;
 	e_task_shell_sidebar_add_source (task_shell_sidebar, source);
@@ -81,7 +81,7 @@ task_shell_view_table_popup_event_cb (EShellView *shell_view,
 
 static void
 task_shell_view_selector_client_added_cb (ETaskShellView *task_shell_view,
-                                          ECal *client)
+                                          ECalClient *client)
 {
 	ETaskShellContent *task_shell_content;
 	ETaskTable *task_table;
@@ -97,7 +97,7 @@ task_shell_view_selector_client_added_cb (ETaskShellView *task_shell_view,
 
 static void
 task_shell_view_selector_client_removed_cb (ETaskShellView *task_shell_view,
-                                            ECal *client)
+                                            ECalClient *client)
 {
 	ETaskShellContent *task_shell_content;
 	ETaskTable *task_table;
@@ -472,39 +472,33 @@ e_task_shell_view_delete_completed (ETaskShellView *task_shell_view)
 		task_shell_view, _("Expunging"), -1.0);
 
 	for (iter = list; iter != NULL; iter = iter->next) {
-		ECal *client = E_CAL (iter->data);
-		GList *objects;
-		gboolean read_only = TRUE;
+		ECalClient *client = E_CAL_CLIENT (iter->data);
+		GSList *objects, *obj;
 		GError *error = NULL;
 
-		if (!e_cal_is_read_only (client, &read_only, &error)) {
-			g_warning ("%s", error->message);
-			g_error_free (error);
-			continue;
-		}
-
-		if (read_only)
+		if (e_client_is_readonly (E_CLIENT (client)))
 			continue;
 
-		if (!e_cal_get_object_list (client, sexp, &objects, &error)) {
-			g_warning ("%s", error->message);
-			g_error_free (error);
+		if (!e_cal_client_get_object_list_sync (client, sexp, &objects, NULL, &error)) {
+			g_debug ("%s: Failed to get object list: %s", G_STRFUNC, error ? error->message : "Unknown error");
+			g_clear_error (&error);
 			continue;
 		}
 
-		while (objects != NULL) {
-			icalcomponent *component = objects->data;
+		for (obj = objects; obj != NULL; obj = obj->next) {
+			icalcomponent *component = obj->data;
 			const gchar *uid;
 
 			uid = icalcomponent_get_uid (component);
-			if (!e_cal_remove_object (client, uid, &error)) {
-				g_warning ("%s", error->message);
+			if (!e_cal_client_remove_object_sync (client, uid, NULL, CALOBJ_MOD_THIS, NULL, &error)) {
+				g_debug ("%s: Failed to remove object: %s", G_STRFUNC, error ? error->message : "Unknown error");
 				g_clear_error (&error);
 			}
 
 			icalcomponent_free (component);
-			objects = g_list_delete_link (objects, objects);
 		}
+
+		e_cal_client_free_icalcomp_slist (objects);
 	}
 
 	e_task_shell_view_set_status_message (task_shell_view, NULL, -1.0);
@@ -603,10 +597,10 @@ e_task_shell_view_update_timezone (ETaskShellView *task_shell_view)
 	clients = e_task_shell_sidebar_get_clients (task_shell_sidebar);
 
 	for (iter = clients; iter != NULL; iter = iter->next) {
-		ECal *client = iter->data;
+		ECalClient *client = iter->data;
 
-		if (e_cal_get_load_state (client) == E_CAL_LOAD_LOADED)
-			e_cal_set_default_timezone (client, timezone, NULL);
+		if (e_client_is_opened (E_CLIENT (client)))
+			e_cal_client_set_default_timezone (client, timezone);
 	}
 
 	g_list_free (clients);
diff --git a/modules/calendar/e-task-shell-view-private.h b/modules/calendar/e-task-shell-view-private.h
index b7dace83b7..ec2173f201 100644
--- a/modules/calendar/e-task-shell-view-private.h
+++ b/modules/calendar/e-task-shell-view-private.h
@@ -29,6 +29,7 @@
 #include <libecal/e-cal-time-util.h>
 #include <libedataserver/e-categories.h>
 #include <libedataserver/e-sexp.h>
+#include <libedataserverui/e-client-utils.h>
 
 #include "e-util/e-dialog-utils.h"
 #include "e-util/e-file-utils.h"
@@ -38,7 +39,6 @@
 #include "misc/e-popup-action.h"
 #include "misc/e-selectable.h"
 
-#include "calendar/common/authentication.h"
 #include "calendar/gui/calendar-config.h"
 #include "calendar/gui/comp-util.h"
 #include "calendar/gui/e-cal-component-preview.h"