public function disableOldAccounts()
 {
     $newList = [];
     $ldap = new LdapComponent();
     $users = User::findAll(['status_id' => Types::$status['active']['id']]);
     foreach ($users as $u) {
         $search = $ldap->userSearch($u->user_name);
         if ($search == false) {
             $u->status_id = Types::$status['inactive']['id'];
             $u->save();
             yii::$app->LogComponent->deactivateUser($u->user_name, sprintf('Removing user: %s %s', $u->first_name, $u->last_name));
             $newList[] = $u;
         }
     }
     return $newList;
 }