CAllIMContactList::SetRecentForNewUser

static function SetRecentForNewUser($userId)
{
	$userId = intval($userId);
	if ($userId <= 0)
	{
		return false;
	}

	$colleagues = BitrixImDepartment::getColleagues($userId);
	foreach ($colleagues as $uid)
	{
		self::SetRecent(Array(
			'ENTITY_ID' => $uid,
			'USER_ID' => $userId
		));
	}

	return true;
}