I've configured a DAG with two servers that have the CAS/HT/MB server roles. When I go ahead and disable the NIC on the primary Ex server (to test the DAG failover functionality) the databases automatically mount on the secondary Ex server just fine. The issue I'm having is that once the DB's mount on the secondary server, Outlook is unable to open users mailboxes. They get " the server is unavailable" message. Do I need a CAS array in order for Outlook client to look for the secondary CAS server once a DAG failover event takes place?