So I'm familiar with doing a standalone installation of exchange but I'm now getting ready to do a transition from 2003 to 2010 which has left me with some questions I haven't been able to find answers for.
First, I should mention, I have transition checklists, lots of documentation regarding the transition, but what I don't see is..
At what point during installation of CAS/HUB roles will the mailflow break. The reason I'm asking this is, I want to know how much of this I can install without impacting the current 2003 environment. I don't have the ability unfortunately to test this in a test environment.