Disable NTLM php script.

Create a ntlm_off.php script with this content

<?

$_SERVER["DOCUMENT_ROOT"] = '/home/bitrix/www/';
$DOCUMENT_ROOT = $_SERVER["DOCUMENT_ROOT"];
define("NO_KEEP_STATISTIC", true);
define("NOT_CHECK_PERMISSIONS",true);
define('BX_NO_ACCELERATOR_RESET', true);
require($_SERVER["DOCUMENT_ROOT"]."/bitrix/modules/main/include/prolog_before.php");

if(!CModule::IncludeModule('ldap'))
   return false;


CLdapUtil::UnSetBitrixVMAuthSupport(true);

echo '

Ntlm auth off;

';

?>

Place in the www root /home/bitrix/www

Run the script through a web browser. Done