I am looking at updating our NT4 domain to W2003 AD. I've tested doing an in-place upgrade of an NT4 PDC to W2003. Then what I want to do (as I hate relying on in-place upgrades) is build a fresh W2003 server, promote to DC, move all the FSMO roles over and then trash the original upgraded DC from NT4. Finally I plan to introduce at least one more W2003 DC as a backup and probably set it up as Global Catalog in addition to the first one. Both DCs would also host DNS integrated into AD and ultimately I plan to upgrade our Exchange 5.5 to Exchange 2003, once the AD network has settled down and is stable.
I have done parts of this but one thing puzzles me. Although the first in-place upgrade prompts to install a DNS server as first in site and sets up integration with AD, how do I do the same with the next (and ultimately primary) server? When I run dcpromo from the command line (or the AD wizard - I assume it amounts to the same thing), neither prompts to install and integrate DNS with AD. All the help I read says make sure you integrate DNS with AD but no-one explains how that is meant to happen - do you simply install DNS before running dcpromo and the integration is done silently, or afterwards and it just does it? Or are you supposed to install DNS in a specific way or run dcpromo in a specific way?
I hope someone can elighten me. Also, any gotchas/hints on the whole upgrade process where Exchange 5.5 and Citrix SP3/FR3 on W2K servers are in the domain would be handy.