I have already prepped the Forest and the Domain for both Exchange 2003 and AD 2003 and when I try to 'dc promo' one of my 2003 servers to a DC I get this message.

I have already prepped the Forest and the Domain for both Exchange 2003 and AD 2003 and when I try to 'dc promo' one of my 2003 servers to a DC I get this message.  I read that if the forest isn't prepped correctly then the AD prep will not be successful, so according to the steps I followed I should have the ability to now add 2003 domain controllers to my environment.  What if anything did I miss?  Are there any particulars when there are already 2003 file servers on a 2000 AD Network?  
AD-Install-error-msg.pdf
bonbon1Asked:
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pbeirneConnect With a Mentor Commented:
1 - NT clients can still run in a Native Mode domain, the Mixed/Native only determines whether you can have NT4 domain controllers or not.  NT4 member servers will work in either.  However, upgrading it to 2000/3 will certainly make supporting it easier.

2 - I don't think this is necessary but you might as well if you dont have any NT4 DCs
3 - Yes to first part- I am not an Exchange admin so can't answer for sure. But don't think so.
4 - Can't remember if it did or not, but they are easy enough to move if not.
5 - Yes

Here is a good link with lots of info pertaining to 2000 to 2003 upgrade:

Common Mistakes When Upgrading a Windows 2000 Domain To a Windows 2003 Domain
http://support.microsoft.com/kb/555040/en-us
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pbeirneCommented:
If you are using 2003 R2, you need to use the version of adprep located on CD2 in the CMPNETS/R2/ADPREP folder
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pbeirneCommented:
(CD2 of the Windows 2003 Server R2 CDs)
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bonbon1Author Commented:
interesting.. I will look for that file right now.. incidentally also I found out that we have an NT4 file server on our network which I was previously unaware of so the 2000 domain needs to be raised to native level correct?  As it is now in mixed, and I do believe that it should be raised before adding 2003 domain controllers - do I need to raise it before I ad prep again?
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bonbon1Author Commented:
If I am being bold by asking you to confirm my next steps based on what I have learned here and from my further research I should:

1) get rid of the NT4 server (upgrade the application that resides on it to a 2000 box)
2) bring my 2000 domain up to native mode
3) run ad prep /forestprep and ad prep /domainprep from the 2nd CD of the 2003 Server R2 CD set

(am I correct in  assuming I will NOT need to run Exchange Forestprep and Adprep again)

4) and I should be able to promo my 2003 file server to my first 2003 DC it will capture the FSMO roles when doing so
5) Then I should demote my 2000 DC's to file servers

done?
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bonbon1Author Commented:
Thanks for following up with my further questions - it made a difference in my planning process and I appreciate it.

Bonnie
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