diff --git a/calendar/inc/class.calendar_groupdav.inc.php b/calendar/inc/class.calendar_groupdav.inc.php
index 0828f01737..425eaf66af 100644
--- a/calendar/inc/class.calendar_groupdav.inc.php
+++ b/calendar/inc/class.calendar_groupdav.inc.php
@@ -552,6 +552,19 @@ error_log(__METHOD__."($path,,".array2string($start).") filter=".array2string($f
 		return true;
 	}
 
+	/**
+	 * Handle post request for a schedule entry
+	 *
+	 * @param array &$options
+	 * @param int $id
+	 * @param int $user=null account_id of owner, default null
+	 * @return mixed boolean true on success, false on failure or string with http status (eg. '404 Not Found')
+	 */
+	function post(&$options,$id,$user=null)
+	{
+		return true;
+	}
+
 	/**
 	 * Fix event series with exceptions, called by calendar_ical::importVCal():
 	 *	a) only series master = first event got cal_id from URL
@@ -637,7 +650,7 @@ error_log(__METHOD__."($path,,".array2string($start).") filter=".array2string($f
 	 */
 	function delete(&$options,$id)
 	{
-		$return_no_access=true;	// to allow to check if current use is a participant and reject the event for him
+		$return_no_access = true;	// to allow to check if current use is a participant and reject the event for him
 		if (!is_array($event = $this->_common_get_put_delete('DELETE',$options,$id,$return_no_access)) || !$return_no_access)
 		{
 			if (!$return_no_access)
diff --git a/phpgwapi/inc/class.groupdav.inc.php b/phpgwapi/inc/class.groupdav.inc.php
index b686c13f1c..89d0baa660 100644
--- a/phpgwapi/inc/class.groupdav.inc.php
+++ b/phpgwapi/inc/class.groupdav.inc.php
@@ -389,6 +389,9 @@ class groupdav extends HTTP_WebDAV_Server
 			case 'calendar':
 				$props[] = self::mkprop(groupdav::CALDAV,'calendar-home-set',array(
 					self::mkprop('href',$this->base_uri.$path.'calendar/')));
+				// OUTBOX URLs of the current user
+				$props[] =	self::mkprop(groupdav::CALDAV,'schedule-outbox-URL',
+					array(self::mkprop(groupdav::DAV,'href',$this->base_uri.'/calendar/')));
 				break;
 			case 'infolog':
 				$props[] = self::mkprop(groupdav::CALDAV,'calendar-home-set',array(
@@ -645,6 +648,34 @@ class groupdav extends HTTP_WebDAV_Server
 		return $arr;
 	}
 
+	/**
+	 * POST method handler
+	 *
+	 * @param  array  parameter passing array
+	 * @return bool   true on success
+	 */
+	function POST(&$options)
+	{
+		// read the content in a string, if a stream is given
+		if (isset($options['stream']))
+		{
+			$options['content'] = '';
+			while(!feof($options['stream']))
+			{
+				$options['content'] .= fread($options['stream'],8192);
+			}
+		}
+		if ($this->debug) error_log(__METHOD__.'('.array2string($options).')');
+		
+		$this->_parse_path($options['path'],$id,$app,$user);
+		
+		if (($handler = self::app_handler($app)) &&	method_exists($handler, 'post'))
+		{
+			return $handler->post($options,$id,$user);
+		}
+		return '501 Not Implemented';
+	}
+	
 	/**
 	 * PUT method handler
 	 *