From: John Cuccia 

On Mon, 28 Feb 2005 21:28:45 -0500, "Geo"  wrote:

>Anyway, 2003 can be a member of a NT4 domain but
>you cannot mix 2000 or 2003 domain controllers with an NT4 domain.

Yep, once you upgrade the PDC the NT4 domain goes away, converted to an
Active Directory domain, but NT4 domain controllers can still function as
BDC's as long as you run AD in what Microsoft calls mixed-mode.

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