diff --git a/root/etc/e-smith/templates/var/lib/sogo/GNUstep/Defaults/.GNUstepDefaults/55authSource b/root/etc/e-smith/templates/var/lib/sogo/GNUstep/Defaults/.GNUstepDefaults/55authSource
index c46a281..66c1ae6 100644
--- a/root/etc/e-smith/templates/var/lib/sogo/GNUstep/Defaults/.GNUstepDefaults/55authSource
+++ b/root/etc/e-smith/templates/var/lib/sogo/GNUstep/Defaults/.GNUstepDefaults/55authSource
@@ -59,8 +59,9 @@
     # is smeserver-dovecot installed ?
     if (-d '/var/service/dovecot'){
         $OUT .=<<"HERE";
-    SOGoAuthenticationType = cas;
-    SOGoCASServiceURL = "https://auth.$DomainName/cas/";
+        SOGoAuthenticationType = cas;
+        SOGoCASServiceURL = "https://auth.$DomainName/cas/";
+        SOGoCASLogoutEnabled = YES;
 HERE
     }
 }