Microsoft KB Archive/891790

= FIX: When the application queries a Windows 2000-based Active Directory after a long idle time, you may experience an authentication failure =

Article ID: 891790

Article Last Modified on 12/1/2006

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
Consider the following scenario. You have an application that may query a Windows 2000-based Active Directory. Then, during a long idle time the application does not query Active Directory. When the application tries to query Active Directory again after the long idle time, the application cannot retrieve information from Active Directory.

In this situation, you may receive various error messages that describe an authentication failure. The error messages may vary depending on the different applications that you use.



CAUSE
After a long idle time, the lightweight directory access protocol (LDAP) connection between the client computer and the domain controller will be automatically disconnected. The LDAP connection will be automatically re-connected when the client application queries Active Directory again.

In some specific scenarios, the wldap32.dll component will incorrectly delete the existing credential in the LDAP connection, when the LDAP connection is re-connected.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;[LN;CNTACTMS]

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
To apply this hotfix, you must have Windows 2000 Service Pack 3 (SP3) installed on the computer.

Restart requirement
You must restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbexpertiseinter kbbug kbfix kbhotfixserver kbqfe kbwin2000presp5fix kbpubtypekc KB891790

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