I have 8 Exchange servers in total.
4 in Site A
4 in Site B
Each site consists of:
2 Mailbox servers in a DAG
I have a CAS Array for the live site.
Members: EXCH01, EXCH02
I will be looking to fail this site over, changing DNS records to point what I need to the servers in Site B.
My question is:
Do I simply need to add the 2 servers in Site B, into the same CAS array and edit the Site location of the Client Access Array when I swap over?
The DAG is stretched between the 2 sites, so only 1 site will be operable at one time. (which is fine).
Out of curiosity too, is there a way of creating an Active/Active site going forward, so we can utilize the servers better?
I'm thinking: I would need to create additional databases and split up the mailboxes into different databases and split these across Mailbox Servers. Assign the mailbox servers to a specific CAS array and set up autodiscover on these servers to point to the CAS NLB in Site B?