As of last night we just updated our AD Schema for the eventual upgrade from Exchange 2003 to 2010. Once we install the CAS/HUB role (same server), the CAS will take over as the primary front-end, correct? Obviously, we need to make DNS changes to point to the new VIP and install certs, but that's what should happen. If the install fails for some reason, is there a good backout plan?
How do I go back to the original settings before trying again? I guess what I'm asking is what exactly is changing just in case I need to go back.