Article ID: 160324 - View products that this article applies to.
This article was previously published under Q160324
You may have problems logging on to your Windows NT domain from a Windows NT Workstation or Server computer that is a member of a domain and receive the following logon message:
The following event may be logged in Event Viewer.
The system cannot log you on to this domain because the system's computer account in its primary domain is missing or the password on that account is incorrect.
Event ID 5721: The session setup to the Windows NT Domain Controller <Unknown> for the domain <Domain Name> failed because the Windows NT Domain Controller does not have an account for the computer <computername>.
The Netlogon service may fail to start and Event 5721 will be logged if one of the following conditions are true:
You should first verify that an account has been created in Server Manager for the computer. You can do this by select "Show Domain Members" from the View menu. If an account does not exist start from Step 3, below.
You should also verify that domain synchronization is successful. For more information, please refer to the following Microsoft Knowledge Base article:
ARTICLE-ID: 149664If the above conditions have been met and you are still receiving the Event ID 5721, the computer account should be recreated and the Windows NT System should rejoin the domain.
TITLE : Verifying Domain Netlogon Synchronization
If you cannot log on to the domain, you can log on to the local computer by selecting the local computer name in the From field and specifying a local user name and password. To do this, perform the following steps:
The above instructions do not apply to Backup Domain Controllers (BDC). For related information on BDCs, please refer to the following Microsoft Knowledge Base article:
TITLE : How to Re-Sync PDC/BDC Trust After Event IDs 3210 and 7023
Article ID: 160324 - Last Review: February 22, 2007 - Revision: 2.2
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