diff --git a/patches.d/scribe-backend.patch b/patches.d/scribe-backend.patch
index f79f82f..5f205fa 100644
--- a/patches.d/scribe-backend.patch
+++ b/patches.d/scribe-backend.patch
@@ -200,7 +200,7 @@ index 69f3411..19ba7a1 100644
              Mise à niveau d'un compte enseignant
          """
 diff --git usr/lib/python3/dist-packages/scribe/eoleldap.py usr/lib/python3/dist-packages/scribe/eoleldap.py
-index 45ec338..9a67c6d 100644
+index 45ec338..0f6125b 100644
 --- usr/lib/python3/dist-packages/scribe/eoleldap.py
 +++ usr/lib/python3/dist-packages/scribe/eoleldap.py
 @@ -8,21 +8,21 @@
@@ -262,6 +262,41 @@ index 45ec338..9a67c6d 100644
          users = []
          res = self.ldap_admin._search("(&%s%s)" % (USER_FILTER, filtre), attrs)
          for user in res:
+@@ -572,21 +570,29 @@ elif LDAP_MODE == 'openldap':
+                 récupère le numéro d'etab du cache ou requète LDAP
+             """
+             if not SUPPORT_ETAB:
+                 return None
+             if not multi_etabs and name in self.cache_etab[_type]:
+                 return self.cache_etab[_type][name]
+             need_close = False
+             if self.ldap_admin.connexion == None:
+                 self.ldap_admin.connect()
+                 need_close = True
+-            dn = self.ldap_admin._search(ldap_filter, [attr])[0][0]
++            try:
++                if _type == 'group':
++                    attr = 'rne'
++                result = self.ldap_admin._search(ldap_filter, [attr])[0]
++                if _type == 'login':
++                    etab = [rne[1]['rne'][0] for rne in self.ldap_admin._search(f'(&(objectClass=eolegroupe)(type=Etablissement)(memberUid={name}))', ['rne'])]
++                else:
++                    etab = result[1]['rne']
++                if not multi_etabs:
++                    etab = etab[0]
++            except:
++                etab = None
+             if need_close:
+                 self.ldap_admin.close()
+-            etab = dn.split(',ou=')[-3]
+-            if multi_etabs:
+-                etab = [etab]
+-            else:
++            if not multi_etabs:
+                 self.cache_etab[_type][name] = etab
+             return etab
+ else:
+     raise Exception('Unknown mode')
 diff --git usr/lib/python3/dist-packages/scribe/eoleuser.py usr/lib/python3/dist-packages/scribe/eoleuser.py
 index 05569fd..74d9485 100644
 --- usr/lib/python3/dist-packages/scribe/eoleuser.py