I am planning the migration of our existing Exchange 2010 setup to Exchange 2013. My concern is with the right way to setup DNS names. I have a single server fulfilling all roles at present and all users use online access only (no cached mailboxes).
Existing 2010 server
Machine name - ex1.domain.local
Internal name - ex1.domain.local
External name - exc.external.org.uk
New Server
The new server will need, eventually, to use exc.external.org.uk externally (which is easily enough achieved after migration).
Obviously the new server needs to start with ex2.domain.local as it's machine name but when I install Exchange 2013 and migrate mailboxes, how will users' Outlook find the new server?
Many thanks
Jay Rubinstein