--- loncom/lontrans.pm	2021/05/03 15:27:42	1.31
+++ loncom/lontrans.pm	2021/07/17 20:34:15	1.32
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # URL translation for User Files
 #
-# $Id: lontrans.pm,v 1.31 2021/05/03 15:27:42 raeburn Exp $
+# $Id: lontrans.pm,v 1.32 2021/07/17 20:34:15 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -89,6 +89,10 @@ sub handler {
             }
             if ($redirect) {
                 my $uri = $r->uri;
+                if (($uri eq '/adm/sso') || ($uri eq '/adm/switchserver') ||
+                    ($uri =~ m{^/Shibboleth.sso/})) {
+                    return DECLINED;
+                }
                 unless ($uri eq '/adm/migrateuser') {
                     my %user;
                     my $handle = &Apache::lonnet::check_for_valid_session($r,undef,\%user);