I currently have two exchange 2003 servers (serverA,serverB) functioning as backend servers. Each server has 20 different mailboxes on it. Currently the DNS is configured with 2 MX records, one for each server. Both servers are able to successfully send and receive email. My question is how do I confiugre this setup so that when someone sends an email and it arrives at serverA but the users mailbox is on serverB it will forward to serverB. Is it possible to configure so that if serverB is offline serverA will hold onto the messages until serverB is back online.
