Currently I am in the process of migrating from Exchange 2007 to Exchange 2010. I plan on running with the 2007 server operation for a bit and believe I am almost to the end of my migration, however the last phases for me are 2 part; CAS Switch and then Mailflow Switch.
I have a few stumbling points that I want to clear up .
Exchange 2007 Environment
1 Exchange 2007 Edge Transport Server
1 Exchange 2007 Server
Exchange 2010 Environment:
2 Barracuda 340 Load Balancers
2 Exchange 2010 SP1 Edge Transport servers
2 Barracuda 340 Load Balancers w/SSL Offloading enabled
2 Exchange 2010 SP1 CAS/HUB/MB servers
I have created the certificate with our email domain and all subject alternative names, as well as created the internal DNS record for legacy.domain.com and pointed that at our 2007 Exchange Server.
I have named the cas array cas.domain.com and put the DNS records in place for that.
I am to the point now that I have actually moved my mailbox to the Exchange 2010 server and if I set it up to go directly to one of the CAS/HUB/MB servers it works perfectly, however if I leave it to resolve to the Cas.domain.com it will not connect. In Outlook the settings coming in showing cas.domain.com and firstname.lastname@example.org shows up in the adddress field, however it will not continue from that point (sorry, I don't have the error message).
Should this work at this point, or do I have to take that leap of faith that everything is working and go in and perform my CAS Switch? (IE: Update 2007 with my new cert and update all my External Facing URL's to legacy.domain.com)
Just as a side note, I have worked directly with Barracuda to make sure the Load Balancers are configured and working correctly.