Hello there,
I am transitioning from Exchange 2003 to 2010.
I am trying to wrap my head around how my firewall should route traffic. Should I direct all Exchange relevant traffic on ports 80, 443, 25 to the new 2010 Exchange and it will re-route traffic to 2003 automatically? (mail, activesync, etc). So basically, the 2010 will be the interface for all exchange relevant queries?
Both of the servers are behind a firewall (Sonicwall) so they share the same Public IP. Sonicwall currently has a NAT policy to route traffic to old 2003 server (above mentioned ports). I have installed CAS, HTS and Mailbox on the 2010 server. I have changed the internal DNS for mail.mydomain.com to point to the new 2010 server. Attempting to do OWA, 2010 pops up properly and also properly forwards to 2003, so internally owa works well I suppose.
Sorry for the newbie questions, just trying to understand the concept before I do something stupid.
Of course the idea is to have a smooth transition until I get all mailboxes transferred.
Thank you!