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Active Directory Upgrade Question

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by tphillips

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Hello,

I have a simple question from a simple senario but it has me scratching my head. When I upgraded a Windows NT 4.0 domain to a Windows 2K AD domain, consisting of only two domain controllers and a client machine the only option that is available upon login is the name of the older Windows NT 4.0 domain name; domainNT.NET. Even though when I check the machines network identification it displays the correct domain membership; domain2K.NET.

Also through network neighboorhood the olderdomain name is displayed; domainNT.NET and is still accessible! From what I understand when upgrading an existing domain you can change to actual domain name aswell. Any assistance would be helpful and appereciated.

I should mention that I have setup DNS on one of the domain controllers, from what it looks like the configuration is correctly. The forward lookup zone contains the entries for all of the 3 domain memberships. The reverse look zone is empty.

Thanks for the Help!

3 replies

by integrityworld.net

The NT Machine has a SID history that is carried forward into AD. If you want to clear this go to the Network control panel and remove the NT PC from the domain then join it to the AD domain. (This requires a couple of reboots)

Off the top of my head I can't think of anything that would fail on the workstation by doing this.

PS your upgrade strategy was not the best! I always prefer to go for a new clean AD!

by timwalsh

A win2K Active Directory (AD) domain actually has TWO domain names: the AD domain name (which follows the DNS domain name format, i.e. mydomain.com), and a NetBIOS domain name (which follows the format ) for backward compatibility with windows clients prior to Win2K.

When conducting a clean installation of AD, the NetBIOS domain name will default to match your AD domain name, but without the Internet TLD extension. You can change the NetBIOS domain name to be completely differentfrom AD domain name if you wish.

When conducting a migration from NT4 to Win2K, the NetBIOS domain name defaults to the old NT4 domain name (which only used NetBIOS), and cannot be changed. The NetBIOS domain name is the one that shows in Network Neighborhood and the Log-on Window. This happens regardless of whether you conducted a migration or a clean install. This cannot be changed.

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