Microsoft KB Archive/940268

= Error message when you try to join a Windows Vista-based client computer to a Windows NT 4.0 domain: &quot;Logon failure: unknown user name or bad password&quot; =

Article ID: 940268

Article Last Modified on 8/1/2007

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APPLIES TO


 * Windows Vista Home Basic
 * Windows Vista Home Premium
 * Windows Vista Ultimate
 * Windows Vista Business
 * Windows Vista Enterprise
 * Windows Vista Home Basic 64-bit Edition
 * Windows Vista Home Premium 64-bit Edition
 * Windows Vista Ultimate 64-bit Edition
 * Windows Vista Business 64-bit Edition
 * Windows Vista Enterprise 64-bit Edition

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Beta Information
This article discusses a beta release of a Microsoft product. The information in this article is provided as-is and is subject to change without notice.

No formal product support is available from Microsoft for this beta product. For information about how to obtain support for a beta release, see the documentation that is included with the beta product files, or check the Web location where you downloaded the release.



SYMPTOMS
When you try to join a Windows Vista-based client computer to a Microsoft Windows NT 4.0 domain, you may receive the following error message:

The following error occurred attempting to join the domain :

Logon failure: unknown user name or bad password

When this problem occurs, the following error may appear in the %windir%\Debug\Netsetup.log file:

NetUseAdd to \\DC01\IPC$ returned 1326

NetpJoinDomain: status of connecting to dc '\\DC01': 0x52e

NetpDoDomainJoin: status: 0x52e

Note Error code 1326 and error code 0x52e are both mapped to the ERROR_LOGON_FAILURE error. The ERROR_LOGON_FAILURE error corresponds to the following error message:

Logon failure: unknown user name or bad password.

This problem also applies to Windows Server 2008.



WORKAROUND
To work around this problem, create the computer account in the Windows NT 4.0 domain before you join the Windows Vista-based client computer to the domain. Or, join the computer to a domain whose domain controller is running one of the following operating systems:
 * Microsoft Windows 2000
 * Windows Server 2003
 * Windows Server 2003 R2
 * Windows Server 2008

Note Microsoft does not support joining a Windows Vista-based client computer to a Microsoft Windows NT 4.0 domain. This scenario has not been tested.



MORE INFORMATION
For more information about the Microsoft support life cycle policy, visit the following Web site:

http://support.microsoft.com/lifecycle

Keywords: kbtshoot kbprb kbexpertiseinter KB940268

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