Question : How to create/use Exchange as a "store and forward" or secondary email server?

I am looking to have a secondary Exchange server in a separate location/IP from my "real" exchange server.  I plan to adjust my MX records to make this a secondary server, to receive mail in the event the primary is unreachable.  Once the primary comes back online, I'd like the secondary to forward all mail received to the primary server.

How is this accomplished?

Answer : How to create/use Exchange as a "store and forward" or secondary email server?

Hi "mikeshaver" could you please confirm mentioned solution?