Both can be done but there may be some catches. Have
a look:
Renaming a Domain: Process and Side Effects
http://support.microsoft.com/kb/q178009/




"Steven T" <StevenT@discussions.microsoft.com> wrote in message news:
> Yup. It turns out that I make use of newsid.exe and have the new DC
> successfully joined to the existing domain as a BDC. I then replicated the
> user information to the new machine and all seems fine. Of cause these
> were
> done in the testing environment using virtual server. If there isn't any
> problem, I think I would take it as the solution and implement it in
> production enivroment.
>
> I have an added question. In NT, does it matter to change the computer
> name
> of the PDC and the Domain? It looks casual and and be changed at any time.
> Thank you.
>