debug mail forwarding

app/Libs/Migrations/Drivers/Version1To2/Settings.php

@@ -104,6 +104,9 @@ class Settings
             'zimbraFeatureWebClientOfflineAccessEnabled',
             'zimbraImapEnabled',
             'zimbraPop3Enabled',
+            'zimbraPrefMailForwardingAddress',
+            'zimbraPrefMailLocalDeliveryDisabled',
+            'zimbraFeatureMailForwardingEnabled',    
         ];
     }