I'm in the process of migrating to Exchange 2010 from 2003. Most everything is up and rolling except for OWA. Currently OWA has been set up to talk to the 2003 server. In other words i can go to https://exchange2010.domain.com/owa and access any mailbox on my 2010 or 2003 servers internally. I have valid Entrust SSL certificates on my 2010 server, and valid Start.com SSL on my 2003 server, both servers use ssl access only and forms based authentication. I have A records for both servers on our dns. If i redirect my firewall to point to the 2010 server i am able to access it from the outside web, i am able to access any mailbox on the 2010 server, however if i try to pull a mailbox from 2003 the URL redirects to https://exchange2003.domain.com/exchange and it comes back page not found. I have also tried adding an IP range to my firewall- for instance my 2003 is .36, 2010 is .41, so my address range is 36-41 for the https rule. I can still only access the 2010 server. Currently the https traffic on the firewall is pointing to the Exchange 2003 server and it is working, but obviously i cant hit the 2010 accounts. what am i missing here? We are running a sonicwall 3500 with the enhanced os if that matters.