diff --git a/config/example-config.php b/config/example-config.php
index 1172bb0f..16a70719 100644
--- a/config/example-config.php
+++ b/config/example-config.php
@@ -471,6 +471,7 @@ $c->admin_email ='calendar-admin@example.com';
 //                             "fullname" => "cn" ,
 //                             "members" =>"memberUid"
 //                             ), //used to create the group based on the ldap properties
+//    'group_member_dnfix' => true, // if your "members" field contains the full DN and needs to be truncated to just the uid
        /** used to set default value for all users, will be overcharged by ldap if defined also in mapping_field **/
 //    'default_value' => array("date_format_type" => "E","locale" => "fr_FR"),
        /** foreach key set start and length in the string provided by ldap
diff --git a/inc/drivers_ldap.php b/inc/drivers_ldap.php
index 93798ed0..b1cdde6c 100644
--- a/inc/drivers_ldap.php
+++ b/inc/drivers_ldap.php
@@ -453,6 +453,7 @@ function sync_LDAP_groups(){
   if ( sizeof($ldap_groups_tmp) == 0 ) return;
 
   $member_field = $mapping['members'];
+  $dnfix = isset($c->authenticate_hook['config']['group_member_dnfix']) && $c->authenticate_hook['config']['group_member_dnfix'];
 
   foreach($ldap_groups_tmp as $key => $ldap_group){
     $group_mapping = $ldap_group[$mapping['username']];
@@ -527,7 +528,7 @@ function sync_LDAP_groups(){
       Principal::cacheDelete('username', $group);
       $c->messages[] = sprintf(i18n('- adding users %s to group : %s'),join(',',$ldap_groups_info[$group][$mapping['members']]),$group);
       foreach ( $ldap_groups_info[$group][$mapping['members']] as $member ){
-        if ( $member_field == 'uniqueMember' ) {
+        if ( $member_field == 'uniqueMember' || $dnfix ) {
           list( $mem, $rest ) = explode(",", $member );
           $member = str_replace( 'uid=', '', $mem );
         }
@@ -543,7 +544,7 @@ function sync_LDAP_groups(){
     foreach ( $groups_to_update as $group ){
       $db_members = array_values ( $db_group_members[$group] );
       $ldap_members = array_values ( $ldap_groups_info[$group][$member_field] );
-      if ( $member_field == 'uniqueMember' ) {
+      if ( $member_field == 'uniqueMember' || $dnfix ) {
         $ldap_members = fix_unique_member( $ldap_members );
       }
       $add_users = array_diff ( $ldap_members, $db_members );