Microsoft KB Archive/126752

= DCs Fail to Synchronize or Validate Users Over NWLINK =

Article ID: 126752

Article Last Modified on 10/31/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Server 3.5

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This article was previously published under Q126752



SYMPTOMS
Windows NT Netlogon services may fail. Users may fail to be logged on and servers may be unable to synchronize. The following errors may appear be or reported in the system log:

1311 There are currently no logon servers available to service the logon request.

5719 No windows NT domain controller is available for domain...

3096 The Windows NT domain controller for this domain could not be located.

3210 Failed to authenticate with, a Windows NT domain controller for domain.

5723 The session setup from the computer failed to authenticate. The name of the account referenced in the security database is. The following error occurred: Access is denied.



CAUSE
When the default protocol becomes inoperable, Netlogon fails to complete operations because it does not attempt to use other installed protocols.

NOTE: Protocols can become inoperable when catastrophic infrastructure problems occur involving routers or network addressing.



RESOLUTION
Netlogon has been updated. When Netlogon receives an error responding to a mailslot message from the first protocol that it attempts to use, it responds to duplicates of the original message received by all available protocols. Datagram mailslot messages are used by Netlogon to initiate client logon operations and inter-domain operations including the synchronization of domain controllers (DCs). By responding to all messages received, Netlogon responds successfully, even if an individual protocol is not operating properly.



STATUS
Microsoft has confirmed this to be a problem in Windows NT version 3.5. This problem was corrected in the latest US Service Pack for Windows NT. For information on obtaining this update, query on the following word in the Microsoft Knowledge Base (without the spaces):

  S E R V P A C K

Additional query words: prodnt domain controller controllers viewer network mail slot net logon

Keywords: KB126752

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