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$rsUsers = CUser::GetList(
   ($by='id'),
   ($order='desc'),
   array(
      'UF_LEADER' => implode(' | ', $LeadersIDs)
   )
);

$arSelect = Array('ID', 'IBLOCK_ID', 'PROPERTY_USER.NAME', 'PROPERTY_USER.LAST_NAME');
$arFilter = Array("IBLOCK_ID" => 777, "ID" => $InfoID);
$res = CIBlockElement::GetList(Array(), $arFilter, false, false, $arSelect);
while($output = $res->Fetch())
   print_r($output);

Array
   (
      [ID] => 777777
      [IBLOCK_ID] => 777
   )

<?PHP
require($_SERVER['DOCUMENT_ROOT']."/bitrix/header.php");

global $USER;
$myID = 31979;
$login = 'myLogin';
$pass = 'NewPass123';

// Обновить пароль и на всякий случай логин
$USER->Update($myID,array("PASSWORD"=>$pass, "LOGIN"=> $login));
print_r($USER->LAST_ERROR);
// Вывод обновленных данных о пользователе
print_r(CUser::GetByID($myID)->Fetch());
// Попытка авторизации по свежим логину и паролю
if (!is_object($USER)) $USER = new CUser;
$arAuthResult = $USER->Login($login, $pass, "Y", "Y");
$APPLICATION->arAuthResult = $arAuthResult;

print_r($arAuthResult);

require($_SERVER['DOCUMENT_ROOT']."/bitrix/footer.php");?>

Array
(
    [MESSAGE] => Неверный логин или пароль.

    [TYPE] => ERROR
    [ERROR_TYPE] => LOGIN
)

$FORM_ID = 13;
$arFilter = array(
     "STATUS_ID" => "48",
     "FIELDS"    => array(
          0 => array(
               "CODE"              => "cource_id",
               "FILTER_TYPE"       => "text",
               "PARAMETER_NAME"    => "USER",
               "VALUE"             => implode(' | ', $Values),
               "EXACT_MATCH"       => "Y"
               )
          )
     );
$resRequests = CFormResult::GetList($FORM_ID, $by="s_timestamp", $order="desc", $arFilter, $is_filtered, "Y");
while($resRequest = $resRequests->GetNext()){
   print_r($resRequest);
}

Array(
    [ID] => 78553
    [~ID] => 78553
    [USER_ID] => 65470
    [~USER_ID] => 65470
    [USER_AUTH] => Y
    [~USER_AUTH] => Y
    [STAT_GUEST_ID] => 1532520
    [~STAT_GUEST_ID] => 1532520
    [STAT_SESSION_ID] => 7894852
    [~STAT_SESSION_ID] => 7894852
    [STATUS_ID] => 48
    [~STATUS_ID] => 48
    [SENT_TO_CRM] => N
    [~SENT_TO_CRM] => N
    [DATE_CREATE] => 28.11.2014 07:41:23
    [~DATE_CREATE] => 28.11.2014 07:41:23
    [TIMESTAMP_X] => 28.11.2014 07:41:23
    [~TIMESTAMP_X] => 28.11.2014 07:41:23
    [STATUS_TITLE] => описание статуса
    [~STATUS_TITLE] => описание статуса
    [STATUS_CSS] => draft
    [~STATUS_CSS] => draft )