I've been setting up my Exchange 2010 CAS/HUB array. Right now, I have both roles on the same VM * 4. However, I'm considering separating the roles on the VM hosts. What is the best practice recommendation?
Mailbox roles reside on two separate VM guests with DAG enabled between the two. The databases are residing on 4TB LUNs.
I have a total of two physical VMWare ESXi servers with the guests spread out equally. There are plenty of resources to go around so, that's not a concern.
Also, since I don't have an Edge Transport, I've been considering adding Anti-Spam to the Hub servers. Any thoughts on that?