@MR. Topaji wrote:
mm.. so it is just a matter of increasing the quantity of EV servers right?
Well pretty much, but you are also constrained by you can't go any better than 1:1. Someone correct me if I'm wrong here, but if you had 8,000 mailboxes on an Exchange 2007 mailbox server (perfectly doable), you can't have 2 EV servers servicing the same Exchange 2007 mailbox server.
This was one of the suggestions Symantec gave us, to reduce our user count per Exchange server if we wanted to continue doing 2 Exchange to 1 EV server. This was unacceptable in our view as our investment in Exchange was already in place, all of our designs and disk subsytems were spec'd out specifically for 4,000 users per server, and reducing that # would be a huge financial hit for us.