After a change in the password for the KRBTGT account (the account that is used for Kerberos authentication), users who are currently logged on may begin to experience unsuccessful authentication to some services.
This behavior is due to the domain controller's no longer being able to decrypt the ticket-granting-tickets that are issued. This limitation occurs because the password history mechanism used for the KRBTGT service is linked to the account password history.
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 the Microsoft 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 2.
217098 Basic Overview of Kerberos Authentication in Windows 2000
Article ID: 295083 - Last Review: Jan 31, 2007 - Revision: 1