imconnector.update.messages

array(
  array(
     //User description array
     'user' => array(
        'id',//User ID in external system*
        'last_name',//Last name
        'name',//Name
        'picture' =>
           array(
              'url'//Link to user avatar, available for portal
           ),
        'url',//Link to user profile
        'sex',//Gender. Male and female are available
     ),
     //Message description array
     'message' => array(
        'id', //Message ID in external system.*
        'date', //Message time in timestamp format*
        'text', //Message text. Element text or files must be specified. 
        'files' => array(//File description array. Each file is described 
                              //by the array, with link, available to the portal
           array('url'),
           array('url'),
           ...
        )
     ),
     //Chat description array 
     'chat' => array(
        'id',//Chat ID in external system *
        'name', //Chat name in external system
        'url', //Chat link in external system
     ),
  ),
  array(...),
);