--- loncom/loncapa_apache.conf	2020/09/12 17:57:03	1.215.2.29
+++ loncom/loncapa_apache.conf	2021/12/14 13:08:26	1.215.2.30
@@ -2,7 +2,7 @@
 ## loncapa_apache.conf -- Apache HTTP LON-CAPA configuration file
 ##
 
-# $Id: loncapa_apache.conf,v 1.215.2.29 2020/09/12 17:57:03 raeburn Exp $
+# $Id: loncapa_apache.conf,v 1.215.2.30 2021/12/14 13:08:26 raeburn Exp $
 
 #
 # LON-CAPA Section (extensions to httpd.conf daemon configuration)
@@ -700,6 +700,7 @@ PerlHandler Apache::migrateuser
 </Location>
 
 <Location /adm/sso>
+  Header set Cache-Control "private,no-store,no-cache,max-age=0"
   <IfModule mod_shib>
     AuthType shibboleth
     ShibUseEnvironment On
@@ -708,6 +709,8 @@ PerlHandler Apache::migrateuser
     require valid-user
     PerlAuthzHandler       Apache::lonshibacc
     PerlAuthzHandler       Apache::lonacc
+    ErrorDocument     403 /adm/login
+    ErrorDocument     500 /adm/errorhandler
   </IfModule>
   <IfModule !mod_shib>
     PerlTypeHandler        Apache::lonnoshib