We have another Windows server which would allow us to move two email domains off our current Exchange 2010 server, we have a total of three. The question is should we setup the new Exchange 2010 or 2013 (we have licensing for both) server and move the domains over or setup a DAG. Looking to address redundancy and disaster recovery concerns. This would be running in a Hyper-V environment.
My thought would be to move two of the three email domains (which are less important) to the new server and have it as a backup to the main email domain. Would have to duplicate backup solution in able to restore or export the mailboxes from the main domain often in order to import to a store in order to get things running again in case of an outage on the primary server.
Feedback is much appreciated!