I have an exchange 2003 organization with 4 front-ends (SMTP gateways, and OWA and RPC/Http) and one mailbox A/P cluster.
These Exchange servers are in a "resource" AD domain (A).
The hosted mailboxes are associated to Active directory accounts in 3 other AD domains (B,C and D).
Domains B and C are in the same AD site as the resource domain whereas domain D is in another AD site.
I am now thinking of the possibility to upgrade/transition to Exchange 2007.
The best way to transition this would have been to have 1 set of CAS/HUB/Mailbox roles deployed in each AD site.
I know Exchange 2007 is routing messages according to AD site link costs.
Nevertheless, would it be possible and supported to have all the Exchange 2007 servers in the same resource domain (A)?
Thanx for reading/helping.