Exchange 5.5 requires a domain, so you must have an NT4 domain - so
therefore the NT4 servers are not just "role servers". You must have 1 PDC
and perhaps a BDC or two?
You won't have any problems installing W2K3 into a new domain and
establishing a trust between the NT4 domain and the new Active Directory
domain, but you won't be able to install W2K3 as a new domain controller
into your existing NT4 domain.
See
http://support.microsoft.com/?id=326209 - you could install your new
server as an NT4 BDC, then promote it to the PDC then upgrade that to a W2K3
domain controller.
"Joe" <(E-Mail Removed)> wrote in message
news:2079b01c45935$09ad7d40$(E-Mail Removed)...
>
> I am going to install a 2003 Server DC into a network
> that runs NT 4.0 servers. As long as the 4.0 Servers are
> just role servers I should not have a problem with them
> interacting with the 2003 server on the domain. Correct
> or am I wrong? Also to note, one of the 4.0 Servers is
> running Exchange 5.5. I don't know if that would make a
> difference.