Windows 2000 Domain Controller Trusts May Not Work with LMCompatibilityLevel of 4 or 5

This article was previously published under Q257646
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When you log on to a trusted domain, you may receive the following error message:
The trust relationship between the primary domain and the trusted domain failed.

This error message can occur if the LMCompatibilityLevel setting is set to 4 or 5 on your domain controllers.
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

This problem was first corrected in Windows 2000 Service Pack 1.
More information
For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:
249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

Article ID: 257646 - Last Review: 10/26/2013 07:28:00 - Revision: 4.0

  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional Edition
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