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Have you tried removing and re-adding the W2000 clients? Do it this way:<br />
1. Right-mouseclick My Computer and select properties. Use the Network Settings tab to place it in a workgroup.<br />
2. Then on the Domain Controller, check in AD Users &amp;&nbsp;Computers whether the computer account is really gone from AD. Remove it if it is still there.<br />
3. Then add it back from the client.
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Have you tried removing and re-adding the W2000 clients? Do it this way:
1. Right-mouseclick My Computer and select properties. Use the Network Settings tab to place it in a workgroup.
2. Then on the Domain Controller, check in AD Users & Computers whether the computer account is really gone from AD. Remove it if it is still there.
3. Then add it back from the client.

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I just did my migration to 2003 AD. &nbsp;Everthing is smooth, except my Win XP clients logon fine, but when ever they try to access a resource it prompts for a username and password. &nbsp;Using their user credentials do not work, but if I use the administrator logon I can get to the resources right away. &nbsp;I am sure this is an easy fix, but &nbsp;Iam stumped as of now. &nbsp;If I logon to any Win 2K machines, I have no problems at all.<br />
<br />
Thanks,
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I just did my migration to 2003 AD.  Everthing is smooth, except my Win XP clients logon fine, but when ever they try to access a resource it prompts for a username and password.  Using their user credentials do not work, but if I use the administrator logon I can get to the resources right away.  I am sure this is an easy fix, but  Iam stumped as of now.  If I logon to any Win 2K machines, I have no problems at all.

Thanks,

NT 4.0 to Win 2003 AD

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).