CWebDavTools::isIntranetUser

static function isIntranetUser($userId)
{
	if(!CModule::IncludeModule('intranet'))
	{
		return false;
	}
	$queryUser = CUser::GetList(
		'id',
		'asc',
		array(
			"ID_EQUAL_EXACT" => $userId,
		),
		array(
			"FIELDS" => array("ID"),
			"SELECT" => array("UF_DEPARTMENT"),
		)
	);
	if ($user = $queryUser->Fetch())
	{
		if (intval($user["UF_DEPARTMENT"][0]) > 0)
		{
			return true;
		}
	}

	return false;
}