We currently have 7 Exchange 2007 servers, all using public IP addressing, and using an F5 device to hand out our SSL cert. The system has been up and running fine for 4 years. We have been tasked with switching our entire infrastructure to private IP addressing, moving everything behind a firewall.
I have created an eighth server with a private IP address that is nat'ed through an ASA to a public IP address. Best Practices tells me everything is up and running just fine. When I check remote connectivity, it is fine as well.
I moved a test account to the private IP server and mail goes nowhere - not to the public servers, not to the "outside" world, nowhere. I am trying to wrap my head around the missing piece but could use some direction. Thanks.