CECEvent::GetExchangeXmlId

static function GetExchangeXmlId($iblockId, $id)
{
	$res = CIBlockElement::GetList(
		Array("SORT"=>"ASC"),
		Array("ID" => $id, "IBLOCK_ID" => $iblockId, "CHECK_PERMISSIONS" => "N"),
		false,
		false,
		Array("XML_ID")
	);

	if ($ar = $res->GetNext())
		return $ar["XML_ID"];

	return 0;
}