--- loncom/auth/migrateuser.pm	2018/07/04 16:58:19	1.34
+++ loncom/auth/migrateuser.pm	2018/11/24 16:19:04	1.35
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Starts a user off based of an existing token.
 #
-# $Id: migrateuser.pm,v 1.34 2018/07/04 16:58:19 raeburn Exp $
+# $Id: migrateuser.pm,v 1.35 2018/11/24 16:19:04 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -69,6 +69,9 @@ sub sso_check {
             $extra_env{'request.sso.reloginserver'} = 
                 $data->{'sso.reloginserver'};
         }
+        if (($data->{'balancer'}) && ($data->{'server'}) && ($data->{'balcookie'})) {
+            $extra_env{'request.balancercookie'} = $data->{'server'}.':'.$data->{'balcookie'};
+        }
     }
     return \%extra_env;
 }
@@ -217,6 +220,11 @@ sub ip_changed {
                     }
                 }
             }
+            unless ($hosthere) {
+                if (($dataref->{'balancer'}) && ($dataref->{'balcookie'})) {
+                    &Apache::lonnet::delbalcookie($dataref->{'balcookie'},$dataref->{'balancer'});
+                }
+            }
         }
         if ($dataref->{'sso.login'}) {
             $url .= '/adm/roles';