diff --git a/addressbook/inc/class.addressbook_groupdav.inc.php b/addressbook/inc/class.addressbook_groupdav.inc.php
index 4c0307333b..e21adb37f3 100644
--- a/addressbook/inc/class.addressbook_groupdav.inc.php
+++ b/addressbook/inc/class.addressbook_groupdav.inc.php
@@ -815,4 +815,52 @@ class addressbook_groupdav extends groupdav_handler
 		}
 		return $shared;
 	}
+
+	/**
+	 * Return appliction specific settings
+	 *
+	 * return array of array with settings
+	 */
+	static function get_settings()
+	{
+		if ($hook_data['setup'])
+		{
+			$addressbooks = array();
+		}
+		else
+		{
+			$user = $GLOBALS['egw_info']['user']['account_id'];
+			$addressbook_bo = new addressbook_bo();
+			$addressbooks = $addressbook_bo->get_addressbooks(EGW_ACL_READ);
+			unset($addressbooks[$user]);	// allways synced
+			unset($addressbooks[$user.'p']);// ignore (optional) private addressbook for now
+		}
+		$addressbooks = array(
+			'A'	=> lang('All'),
+			'G'	=> lang('Primary Group'),
+			'U' => lang('Accounts'),
+		) + $addressbooks;
+
+		// rewriting owner=0 to 'U', as 0 get's always selected by prefs
+		if (!isset($addressbooks[0]))
+		{
+			unset($addressbooks['U']);
+		}
+		else
+		{
+			unset($addressbooks[0]);
+		}
+
+		$settings = array();
+		$settings['addressbook-home-set'] = array(
+			'type'   => 'multiselect',
+			'label'  => 'Addressbooks to sync in addition to personal addressbook',
+			'name'   => 'addressbook-home-set',
+			'help'   => lang('Only supported by a few fully conformant clients (eg. from Apple). If you have to enter a URL, it will most likly not be suppored!').'<br/>'.lang('They will be sub-folders in users home (%1 attribute).','CardDAV "addressbook-home-set"'),
+			'values' => $addressbooks,
+			'xmlrpc' => True,
+			'admin'  => False,
+		);
+		return $settings;
+	}
 }
diff --git a/calendar/inc/class.calendar_groupdav.inc.php b/calendar/inc/class.calendar_groupdav.inc.php
index 532daa00de..da77c8ab2a 100644
--- a/calendar/inc/class.calendar_groupdav.inc.php
+++ b/calendar/inc/class.calendar_groupdav.inc.php
@@ -1251,4 +1251,43 @@ class calendar_groupdav extends groupdav_handler
 		}
 		return $shared;
 	}
+
+	/**
+	 * Return appliction specific settings
+	 *
+	 * return array of array with settings
+	 */
+	static function get_settings()
+	{
+		if ($hook_data['setup'])
+		{
+			$calendars = array();
+		}
+		else
+		{
+			$user = $GLOBALS['egw_info']['user']['account_id'];
+			$cal_bo = new calendar_bo();
+			foreach ($cal_bo->list_cals() as $entry)
+			{
+				$calendars[$entry['grantor']] = $entry['name'];
+			}
+			unset($calendars[$user]);
+		}
+		$calendars = array(
+			'A'	=> lang('All'),
+			'G'	=> lang('Primary Group'),
+		) + $calendars;
+
+		$settings = array();
+		$settings['calendar-home-set'] = array(
+			'type'   => 'multiselect',
+			'label'  => 'Calendars to sync in addition to personal calendar',
+			'name'   => 'calendar-home-set',
+			'help'   => lang('Only supported by a few fully conformant clients (eg. from Apple). If you have to enter a URL, it will most likly not be suppored!').'<br/>'.lang('They will be sub-folders in users home (%1 attribute).','CalDAV "calendar-home-set"'),
+			'values' => $calendars,
+			'xmlrpc' => True,
+			'admin'  => False,
+		);
+		return $settings;
+	}
 }
diff --git a/infolog/inc/class.infolog_groupdav.inc.php b/infolog/inc/class.infolog_groupdav.inc.php
index 40f33e22ff..5f95046add 100644
--- a/infolog/inc/class.infolog_groupdav.inc.php
+++ b/infolog/inc/class.infolog_groupdav.inc.php
@@ -612,4 +612,35 @@ class infolog_groupdav extends groupdav_handler
 
 		return $handler;
 	}
-}
\ No newline at end of file
+
+	/**
+	 * Return appliction specific settings
+	 *
+	 * return array of array with settings
+	 */
+	static function get_settings()
+	{
+		translation::add_app('infolog');
+		$infolog = new infolog_bo();
+
+		if (!($types = $infolog->enums['type']))
+		{
+			$types = array(
+				'task' => 'Tasks',
+			);
+		}
+
+		$settings = array();
+		$settings['infolog-types'] = array(
+			'type'   => 'multiselect',
+			'label'  => 'InfoLog types to sync',
+			'name'   => 'infolog-types',
+			'help'   => 'Which InfoLog types should be synced with the device, default only tasks.',
+			'values' => $types,
+			'default' => 'task',
+			'xmlrpc' => True,
+			'admin'  => False,
+		);
+		return $settings;
+	}
+}
diff --git a/phpgwapi/inc/class.groupdav_handler.inc.php b/phpgwapi/inc/class.groupdav_handler.inc.php
index 253c28ffa8..77ffb072ab 100644
--- a/phpgwapi/inc/class.groupdav_handler.inc.php
+++ b/phpgwapi/inc/class.groupdav_handler.inc.php
@@ -467,6 +467,16 @@ abstract class groupdav_handler
 		return array();
 	}
 
+	/**
+	 * Return appliction specific settings
+	 *
+	 * return array of array with settings
+	 */
+	static function get_settings()
+	{
+		return array();
+	}
+
 	/**
 	 * Add a resource
 	 *
diff --git a/phpgwapi/inc/class.groupdav_hooks.inc.php b/phpgwapi/inc/class.groupdav_hooks.inc.php
index c5db8540ee..fe6aae8bf6 100644
--- a/phpgwapi/inc/class.groupdav_hooks.inc.php
+++ b/phpgwapi/inc/class.groupdav_hooks.inc.php
@@ -54,91 +54,20 @@ class groupdav_hooks
 
 		if ($hook_data['setup'])
 		{
-			$addressbooks = array();
+			$apps = array('addressbook','calendar','infolog');
 		}
 		else
 		{
-			$user = $GLOBALS['egw_info']['user']['account_id'];
-			$addressbook_bo = new addressbook_bo();
-			$addressbooks = $addressbook_bo->get_addressbooks(EGW_ACL_READ);
-			unset($addressbooks[$user]);	// allways synced
-			unset($addressbooks[$user.'p']);// ignore (optional) private addressbook for now
+			$apps = array_keys($GLOBALS['egw_info']['user']['apps']);
 		}
-		$addressbooks = array(
-			'A'	=> lang('All'),
-			'G'	=> lang('Primary Group'),
-			'U' => lang('Accounts'),
-		) + $addressbooks;
-
-		// rewriting owner=0 to 'U', as 0 get's always selected by prefs
-		if (!isset($addressbooks[0]))
+		foreach($apps as $app)
 		{
-			unset($addressbooks['U']);
-		}
-		else
-		{
-			unset($addressbooks[0]);
-		}
-
-		$settings['addressbook-home-set'] = array(
-			'type'   => 'multiselect',
-			'label'  => 'Addressbooks to sync in addition to personal addressbook',
-			'name'   => 'addressbook-home-set',
-			'help'   => lang('Only supported by a few fully conformant clients (eg. from Apple). If you have to enter a URL, it will most likly not be suppored!').'<br/>'.lang('They will be sub-folders in users home (%1 attribute).','CardDAV "addressbook-home-set"'),
-			'values' => $addressbooks,
-			'xmlrpc' => True,
-			'admin'  => False,
-		);
-
-		if ($hook_data['setup'])
-		{
-			$calendars = array();
-		}
-		else
-		{
-			$user = $GLOBALS['egw_info']['user']['account_id'];
-			$cal_bo = new calendar_bo();
-			foreach ($cal_bo->list_cals() as $entry)
+			$class_name = $app.'_groupdav';
+			if (class_exists($class_name, true))
 			{
-				$calendars[$entry['grantor']] = $entry['name'];
+				$settings += call_user_func(array($class_name,'get_settings'));
 			}
-			unset($calendars[$user]);
 		}
-		$calendars = array(
-			'A'	=> lang('All'),
-			'G'	=> lang('Primary Group'),
-		) + $calendars;
-
-		$settings['calendar-home-set'] = array(
-			'type'   => 'multiselect',
-			'label'  => 'Calendars to sync in addition to personal calendar',
-			'name'   => 'calendar-home-set',
-			'help'   => lang('Only supported by a few fully conformant clients (eg. from Apple). If you have to enter a URL, it will most likly not be suppored!').'<br/>'.lang('They will be sub-folders in users home (%1 attribute).','CalDAV "calendar-home-set"'),
-			'values' => $calendars,
-			'xmlrpc' => True,
-			'admin'  => False,
-		);
-
-		translation::add_app('infolog');
-		$infolog = new infolog_bo();
-
-		if (!($types = $infolog->enums['type']))
-		{
-			$types = array(
-				'task' => 'Tasks',
-			);
-		}
-
-		$settings['infolog-types'] = array(
-			'type'   => 'multiselect',
-			'label'  => 'InfoLog types to sync',
-			'name'   => 'infolog-types',
-			'help'   => 'Which InfoLog types should be synced with the device, default only tasks.',
-			'values' => $types,
-			'default' => 'task',
-			'xmlrpc' => True,
-			'admin'  => False,
-		);
 
 		$settings['debug_level'] = array(
 			'type'   => 'select',