I am almost done with my Exchange migration, but I have run into a snag. First, let me give a background on the current setup. We have an Exchange 2003 server and an Exchange 2010 server in coexistence, and email filtering from MXLogic. I can access both servers without issue from inside the network. However, since we only have one static IP, the mailboxes on the Exchange 2010 server cannot be accessed from the outside, that is, with ActveSync, OWA, or RPC over HTTP. I guess this is likely because the router/firewall is configured to pass exchange traffic to the 2003 server. What I'd like to be able to do is use both servers from the outside if possible. Is there a way to make the traffic flow to the exchange 2010 server from MXLogic, and then make the Exchange 2003 server a kind of backend server? Although, the mailboxes on 2003 should still be accessible via ActiveSync and RPC over HTTP. Thanks!