My office is currently running a hybrid exchange 2003/2007 environment. Apparently our version of exchange 2007 is the regular. No upgrades to service packs. I have encountered a problem that seems to be fixed with one of the service packs. In out environment, the 2003 server is the outward facing server and the 2007 server handles all internal direction, distribution groups, and owa. What I want to know, since I don't know exchange, is twofold.
First I would like to know how I check dependencies on the exchange 2003 server. That way I can find out if we a really still need it at all.
Secondly I would like to know if upgrading to service packs 1 and 2 on the 2007 server will affect the relationship that they have with each other.