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Bring an old windows 2000 AD domain from Mixed to Native mode

Posted on 2011-02-17
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Okay, I've got a windows 2000 mixed mode active directory domain including four DC's running server 2000 SP4 and one member server running exchange 2003 SP2  The domain is in Mixed mode because we had some DEC Alpha servers that were running pathworks.  The alpha's have been decommissioned, and are no longer in the domain.  We have between 75 and 100 pcs/laptops running a mix of XP and Win7.  We would like to move to Native mode and then upgrade our servers to server 2008.

My question has to do with converting from mixed to native mode.  In the Active Directory Domains and Trusts snap-in, there's a button to change mode.  What steps should I take (other than a full backup) prior to pushing the button?  Also, since this is a one-way door, what else should I look into before making this move?  Additionally, do I need to run the Change Mode script from each DC or just one?
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Question by:dcmathis
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Mike Kline earned 500 total points
ID: 34920480
You only change it once;  having backups is a good idea but other than that you don't need to do anything else.

Good job planning on moving away from Windows 2000 as that stopped being supported last summer.

Thanks

Mike
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by:dcmathis
ID: 34920543
So with the domain as it sits now, all I have to do is click the Change Mode button and watch the magic happen?
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Expert Comment

by:RickSheikh
ID: 34920556
As Mike said. However, only thing that could have prevented you from going to 2000 native mode had to be the DCs that were not running minimally W2K OS. Members servers do not matter.

http://support.microsoft.com/kb/322692

One a side note, all is not lost, you gain the following features by going to Windows 2000 native mode :)

# Universal groups for both distribution and security groups.

# Group nesting

# Group conversion, which allows conversion between security and distribution groups

# Security identifier (SID) history

http://technet.microsoft.com/en-us/library/understanding-active-directory-functional-levels%28WS.10%29.aspx

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