function do_synchroniseGroup()
 {
     $old_search = KTUtil::arrayGet($_REQUEST, 'old_search');
     require_once KT_LIB_DIR . '/authentication/authenticationutil.inc.php';
     $oGroup =& $this->oValidator->validateGroup($_REQUEST['group_id']);
     $res = KTAuthenticationUtil::synchroniseGroupToSource($oGroup);
     $this->successRedirectTo('manageusers', 'Group synchronised', sprintf('group_id=%d', $oGroup->getId()), sprintf("old_search=%s&do_search=1", $old_search));
     exit(0);
 }
<?php

require_once "../../config/dmsDefaults.php";
require_once KT_LIB_DIR . '/groups/Group.inc';
require_once KT_LIB_DIR . '/authentication/authenticationutil.inc.php';
$oGroup = Group::get(5);
$foo = KTAuthenticationUtil::synchroniseGroupToSource($oGroup);
var_dump($foo);