Scenario:
Single Forest / Domain
AD SITE A: 2 x 2008 R2 DCs (Subnet 1), 3 x Exchange 2010 Mailbox Servers in a DAG, 3 x CAS / HT dual-role servers load balanced.
AD SITE B: 1 x 2008 R2 DCs (Subnet 2)
Full Daily Backups of Exchange nodes plus Databases
Complete site disaster occurs at Site A, never to return to service.
Question:
What is the most efficient method of restoring Exchange services at AD Site B? Believe this could be Build New Multi-Role Exchange server and use Database Portability methods to restore data into this new server at AD Site B, but would welcome thoughts as to the quickest and most efficient method of restoring service.