Event ID 529 Unknown User Name Or Bad Password

 Last reviewed: October 2, 1997
Article ID: Q150530
The information in this article applies to:
  • Microsoft Windows NT Server versions 3.5 and 3.51
  • Microsoft Windows 95

SUMMARY

After you add newly created user accounts to a domain, you may notice that Windows 95 clients cannot log on to the domain with any of the newly created accounts. The Windows 95 clients will report the following error: 

   User name cannot be found
The same Windows 95 clients can log on to the domain with previously existing user accounts. You will also notice that Windows NT workstations can log on to the domain with these newly created accounts.

Check the primary domain controllers (PDCs) Event Viewer Security Log for the following:

Event ID 529 Description: Logon Failure: 

   Reason:     Unknown user name or bad password
   User Name:  GUEST
   Domain:     NameOfYourDomain
   Logon Type: 3
   Logon Process: NCPSrv
   Authentication Package:
   Workstation Name:
NOTE: Your entries may vary, that is, the user name will not always be GUEST.

MORE INFORMATION

The above scenario has been linked to other domain controllers in the domain running out of resources. At this point, you will need to check all of the servers in the domain that validate user accounts.

Check all the servers in the domain that validate user accounts for:

  • servers that are running out of disk space.
  • servers that have stopped responding (this may mean actually visiting the server).
  • servers that report Event IDs stating they have not been able to synchronize with the PDC. The server will report that insufficient system resources exist to complete the requested service.

After you find the domain controller with insufficient system resources, you may either take that server offline, so that it is not involved in the validation process, or fix the resource problem and re-synchronize the domain controller with its PDC. If the problem persists, you may need to take a trace of the Windows 95 computer while it is trying to log on to the domain to help further identify problem areas. 
Keywords          : ntdomain NTINTEROP NTSrv kbnetwork
Version           : WinNT:3.5,3.51
Platform          : winnt

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Last reviewed: October 2, 1997
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