Doing a side-by-side upgrade to Exchange 2010. I have users on Exchange 2007, some are already moved to Exchange 2010. I relay mail via a smart host (hosted SPAM filter solution)
- Users from Exchange 2007 can send/receive emails externally and internally
- Users from Exchange 2010 can send externally/receive externally and receive internally BUT
Problem is Exchange 2010 users cannot reply or send internally to Exchange 2007 users.
Am i missing a connection between 2010 and 2007 until i finish moving everyone over?