Tried an other way of fixing plist&config loop dependency

html/index.php

@@ -321,13 +321,13 @@ class Index {
     /* User might have its own language, re-run initLanguage */
     initLanguage();
 
-    /* Check that newly installed plugins have their configuration in the LDAP (needed before load_plist to avoid PHP errors of missing RDNs in config) */
-    $config->checkLdapConfig();
-
     /* We need a fully loaded plist and config to test account expiration */
     session::global_un_set('plist');
     $plist = load_plist();
 
+    /* Check that newly installed plugins have their configuration in the LDAP (will reload plist if needed) */
+    $config->checkLdapConfig();
+
     /* Check account expiration */
     if ($config->get_cfg_value('handleExpiredAccounts') == 'TRUE') {
       $expired = $ui->expired_status();

include/functions.inc

@@ -1081,8 +1081,7 @@ function get_ou($name)
     $ou = $map[$name];
     return $ou;
   } else {
-    trigger_error('No department mapping found for type '.$name);
-    return '';
+    return NULL;
   }
 
   if ($ou != '') {