As we making OCS 2007 as the main call manager, high avaiability and scalability would one of be the main components we (IT person) to consider. Scalability in OCS 2007 would be easy as Microsoft has addressed this metter. The second point which other players in the IP Telephony industry is questioning Microsoft is; can OCS 2007 have the disaster recovery solution?
There are some solutions from others Microsoft team proposed which using backup and recovery method on the OCS 2007 server. Can it be automated? This has makes me to investigate more in my current lab. I've trying to create a auto service failover to DR server when the production server is down. I'll continue more after my lab test.
I've browse around, M Senthil Kumar blog has a discussion on backup OCS 2007 configuration guide. (http://blogs.msdn.com/mskumar/archive/2008/02/11/backing-up-ocs-2007-global-config.aspx)