diff --git a/lib/ext/Syncroton/Model/EventAttendee.php b/lib/ext/Syncroton/Model/EventAttendee.php
index 59ee59c..cb6f147 100644
--- a/lib/ext/Syncroton/Model/EventAttendee.php
+++ b/lib/ext/Syncroton/Model/EventAttendee.php
@@ -1,51 +1,57 @@
 <?php
 /**
  * Syncroton
  *
  * @package     Syncroton
  * @subpackage  Model
  * @license     http://www.tine20.org/licenses/lgpl.html LGPL Version 3
  * @copyright   Copyright (c) 2012-2012 Metaways Infosystems GmbH (http://www.metaways.de)
  * @author      Lars Kneschke <l.kneschke@metaways.de>
  */
 
 /**
  * class to handle ActiveSync event
  *
  * @package     Syncroton
  * @subpackage  Model
  *
- * @property    int    $attendeStatus
- * @property    int    $attendeeType
- * @property    string $email
- * @property    string $name
+ * @property  int       $attendeeStatus
+ * @property  int       $attendeeType
+ * @property  string    $email
+ * @property  string    $name
+ * @property  datetime  $proposedEndTime
+ * @property  datetime  $proposedStartTime
  */
 class Syncroton_Model_EventAttendee extends Syncroton_Model_AXMLEntry
 {
     /**
      * attendee status
      */
     const ATTENDEE_STATUS_UNKNOWN       = 0;
     const ATTENDEE_STATUS_TENTATIVE     = 2;
     const ATTENDEE_STATUS_ACCEPTED      = 3;
     const ATTENDEE_STATUS_DECLINED      = 4;
     const ATTENDEE_STATUS_NOTRESPONDED  = 5;
 
     /**
      * attendee types
      */
     const ATTENDEE_TYPE_REQUIRED = 1;
     const ATTENDEE_TYPE_OPTIONAL = 2;
     const ATTENDEE_TYPE_RESOURCE = 3;
 
     protected $_xmlBaseElement = 'Attendee';
 
     protected $_properties = array(
         'Calendar' => array(
             'attendeeStatus'          => array('type' => 'number'),
             'attendeeType'            => array('type' => 'number'),
             'email'                   => array('type' => 'string'),
             'name'                    => array('type' => 'string'),
-        )
+        ),
+        'MeetingResponse' => array(
+            'proposedEndTime'         => array('type' => 'datetime', 'supportedSince' => '16.1'),
+            'proposedStartTime'       => array('type' => 'datetime', 'supportedSince' => '16.1'),
+        ),
     );
 }
diff --git a/lib/ext/Syncroton/Model/MeetingRequest.php b/lib/ext/Syncroton/Model/MeetingRequest.php
index b24045a..0546656 100644
--- a/lib/ext/Syncroton/Model/MeetingRequest.php
+++ b/lib/ext/Syncroton/Model/MeetingRequest.php
@@ -1,106 +1,112 @@
 <?php
 /**
  * Syncroton
  *
  * @package     Syncroton
  * @subpackage  Model
  * @license     http://www.tine20.org/licenses/lgpl.html LGPL Version 3
  * @copyright   Copyright (c) 2012-2012 Metaways Infosystems GmbH (http://www.metaways.de)
  * @author      Lars Kneschke <l.kneschke@metaways.de>
  */
 
 /**
  * class to handle Email:MeetingRequest
  *
  * @package     Syncroton
  * @subpackage  Model
  * @property    bool            $allDayEvent
  * @property    int             $busyStatus
  * @property    int             $disallowNewTimeProposal
  * @property    DateTime        $dtStamp
  * @property    DateTime        $endTime
  * @property    Syncroton_Model_Forwardee[] $forwardees
  * @property    string          $globalObjId
  * @property    int             $instanceType
  * @property    Syncroton_Model_Location    $location
  * @property    int             $meetingMessageType
  * @property    string          $organizer
+ * @property    datetime        $proposedEndTime
+ * @property    datetime        $proposedStartTime
  * @property    string          $recurrenceId
  * @property    array           $recurrences
  * @property    int             $reminder
  * @property    int             $responseRequested
  * @property    int             $sensitivity
  * @property    DateTime        $startTime
  * @property    string          $timezone
  */
 class Syncroton_Model_MeetingRequest extends Syncroton_Model_AXMLEntry
 {
     /**
      * busy status constants
      */
     const BUSY_STATUS_FREE      = 0;
     const BUSY_STATUS_TENATTIVE = 1;
     const BUSY_STATUS_BUSY      = 2;
     const BUSY_STATUS_OUT       = 3;
 
     /**
      * sensitivity constants
      */
     const SENSITIVITY_NORMAL       = 0;
     const SENSITIVITY_PERSONAL     = 1;
     const SENSITIVITY_PRIVATE      = 2;
     const SENSITIVITY_CONFIDENTIAL = 3;
 
     /**
      * instanceType constants
      */
     const TYPE_NORMAL              = 0;
     const TYPE_RECURRING_MASTER    = 1;
     const TYPE_RECURRING_SINGLE    = 2;
     const TYPE_RECURRING_EXCEPTION = 3;
 
     /**
      * messageType constants
      */
     const MESSAGE_TYPE_NORMAL      = 0;
     const MESSAGE_TYPE_REQUEST     = 1;
     const MESSAGE_TYPE_FULL_UPDATE = 2;
     const MESSAGE_TYPE_INFO_UPDATE = 3;
     const MESSAGE_TYPE_OUTDATED    = 4;
     const MESSAGE_TYPE_COPY        = 5;
     const MESSAGE_TYPE_DELEGATED   = 6;
 
     protected $_dateTimeFormat = "Ymd\THis\Z";
 
     protected $_xmlBaseElement = 'MeetingRequest';
 
     protected $_properties = array(
         'AirSyncBase' => array(
             'location'                  => array('type' => 'container', 'class' => 'Syncroton_Model_Location', 'supportedSince' => '16.0'),
         ),
         'ComposeMail' => array(
             'forwardees'                => array('type' => 'container', 'childElement' => 'forwardee', 'supportedSince' => '16.0'),
         ),
         'Email' => array(
             'allDayEvent'               => array('type' => 'number'),
             'busyStatus'                => array('type' => 'number'),
             'disallowNewTimeProposal'   => array('type' => 'number'),
             'dtStamp'                   => array('type' => 'datetime'),
             'endTime'                   => array('type' => 'datetime'),
             'globalObjId'               => array('type' => 'string'),
             'instanceType'              => array('type' => 'datetime'),
             'location'                  => array('type' => 'string', 'supportedUntil' => '16.0'),
             'organizer'                 => array('type' => 'string'), //e-mail address
             'recurrenceId'              => array('type' => 'datetime'),
             'recurrences'               => array('type' => 'container'),
             'reminder'                  => array('type' => 'number'),
             'responseRequested'         => array('type' => 'number'),
             'sensitivity'               => array('type' => 'number'),
             'startTime'                 => array('type' => 'datetime'),
             'timeZone'                  => array('type' => 'timezone'),
         ),
         'Email2' => array(
             'meetingMessageType'        => array('type' => 'number'),
         ),
+        'MeetingResponse' => array(
+            'proposedEndTime'           => array('type' => 'datetime', 'supportedSince' => '16.1'),
+            'proposedStartTime'         => array('type' => 'datetime', 'supportedSince' => '16.1'),
+        ),
     );
 }
diff --git a/lib/ext/Syncroton/Model/MeetingResponse.php b/lib/ext/Syncroton/Model/MeetingResponse.php
index 2dfc08f..5957a9f 100644
--- a/lib/ext/Syncroton/Model/MeetingResponse.php
+++ b/lib/ext/Syncroton/Model/MeetingResponse.php
@@ -1,46 +1,51 @@
 <?php
+
 /**
  * Syncroton
  *
  * @package     Syncroton
  * @subpackage  Model
  * @license     http://www.tine20.org/licenses/lgpl.html LGPL Version 3
  * @copyright   Copyright (c) 2012-2012 Metaways Infosystems GmbH (http://www.metaways.de)
  * @author      Lars Kneschke <l.kneschke@metaways.de>
  */
 
 /**
  * class to handle MeetingResponse request
  *
  * @package     Syncroton
  * @subpackage  Model
- * @property    int     userResponse
- * @property    string  collectionId
- * @property    string  calendarId
- * @property    string  requestId
- * @property    string  instanceId
- * @property    string  longId
+ *
+ * @property  string  $calendarId
+ * @property  string  $collectionId
+ * @property  string  $instanceId
+ * @property  string  $longId
+ * @property  string  $requestId
+ * @property  Syncroton_Model_SendResponse $sendResponse
+ * @property  int     $userResponse
  */
 class Syncroton_Model_MeetingResponse extends Syncroton_Model_AXMLEntry
 {
     /**
      * attendee status
      */
     const RESPONSE_ACCEPTED  = 1;
     const RESPONSE_TENTATIVE = 2;
     const RESPONSE_DECLINED  = 3;
 
     protected $_xmlBaseElement = 'Request';
+
     protected $_properties = array(
         'MeetingResponse' => array(
-            'userResponse'  => array('type' => 'number'),
-            'collectionId'  => array('type' => 'string'),
             'calendarId'    => array('type' => 'string'),
-            'requestId'     => array('type' => 'string'),
+            'collectionId'  => array('type' => 'string'),
             'instanceId'    => array('type' => 'datetime'),
+            'requestId'     => array('type' => 'string'),
+            'sendResponse'  => array('type' => 'container', 'class' => 'Syncroton_Model_SendResponse', 'supportedSince' => '16.0'),
+            'userResponse'  => array('type' => 'number'),
         ),
         'Search' => array(
             'longId'        => array('type' => 'string')
         )
     );
 }
diff --git a/lib/ext/Syncroton/Model/SendResponse.php b/lib/ext/Syncroton/Model/SendResponse.php
new file mode 100644
index 0000000..3b52796
--- /dev/null
+++ b/lib/ext/Syncroton/Model/SendResponse.php
@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * Syncroton
+ *
+ * @package     Syncroton
+ * @subpackage  Model
+ * @license     http://www.tine20.org/licenses/lgpl.html LGPL Version 3
+ * @copyright   Copyright (c) 2012-2012 Metaways Infosystems GmbH (http://www.metaways.de)
+ * @author      Lars Kneschke <l.kneschke@metaways.de>
+ */
+
+/**
+ * Class to handle MeetingResponse::SendResponse
+ *
+ * @package     Syncroton
+ * @subpackage  Model
+ *
+ * @property  Syncroton_Model_EmailBody  $body
+ * @property  datetime  $proposedEndTime
+ * @property  datetime  $proposedStartTime
+ */
+class Syncroton_Model_SendResponse extends Syncroton_Model_AXMLEntry
+{
+    protected $_xmlBaseElement = 'SendResponse';
+
+    protected $_properties = array(
+        'AirSyncBase' => array(
+            'body'               => array('type' => 'container', 'class' => 'Syncroton_Model_EmailBody')
+        ),
+        'MeetingResponse' => array(
+            'proposedEndTime'    => array('type' => 'datetime', 'supportedSince' => '16.1'),
+            'proposedStartTime'  => array('type' => 'datetime', 'supportedSince' => '16.1'),
+        ),
+    );
+}