not sure if this is possible, but we have Exchange 2010 deloyed in a co-existence mode with our exchange 2003 Org. [same domain / forest]
Does anyone know of a way, that if a user that still has a mailbox on Exchange 2003, but uses a later client like Outlook 2010, is there a way for it to auto discover and realize the mailbox is on 2003 and auto configure for the 2003 user?
other wise, i have to have all 2003 exchange users that are running outlook 2010 clients to choose "manual" config when creating a new profile.
any advice would be appreciated!