I'm looking to come up with an implementation plan. I will have an Exchange 2003 server up and running shortly, after we migrate from E2K.
The idea is to have redundancy through multiple sites. From some of the research I've been able to do, I don't think it's possible to "sync" multiple Exchange (2003) servers, unless they are configured as a cluster. The end result is to have a server sitting in a DC that can receive mail. Ideally, all users from all sites could use this exchange server, if something happens to their local exchange server. The DC would have a Citrix server allowing remote access to files, etc.
I'm assuming that I will need Exchange Advanced...