--- auth/ldap/auth.php	Tue Dec 06 17:21:32 2011
+++ auth/ldap/auth.php	Wed Jun 13 12:38:25 2012
@@ -1625,7 +1625,8 @@
             add_to_log(SITEID, 'user', 'login', "view.php?id=$USER->id&course=".SITEID,
                        $user->id, 0, $user->id);
             complete_user_login($user);
-
+            $SESSION->ssologin = 1;
+            
             // Cleanup the key to prevent reuse...
             // and to allow re-logins with normal credentials
             unset_cache_flag($this->pluginconfig.'/ntlmsess', $key);