We have Unified 4.21 (might upgrade to 7.0 later this year) with exchange 2003 (external).
We have failover design (active/passive) now. In the very near future, we will have DR site.
I think my question is that:
Can Failover and standby Redundancy co-exist?? In other words, two servers with failover at Main Data Center, and 1 server with Standby Redundancy at DR Site.
Anyone done that before??