Microsoft KB Archive/911971

= Error message when a DAV client tries to authenticate with an Exchange Server 2003 SP1 front-end server: &quot;HTTP 500 - Internal server error&quot; =

Article ID: 911971

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange Server 2003 Enterprise Edition

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SYMPTOMS
Consider the following scenario. A user uses tries to access a mailbox by using a Distributed Authoring and Version (DAV) e-mail client program, such as Microsoft Outlook Web Access or Microsoft Entourage. Additionally, the following conditions are true:
 * Microsoft Exchange is configured in a front-end and back-end architecture.
 * The front-end server is running Microsoft Exchange Server 2003 Service Pack 1 (SP1) on a Microsoft Windows Server 2003-based computer.
 * The user tries to authenticate with the Exchange Server 2003 SP1 front-end server.

In this scenario, the user receives the following error message:

HTTP 500 - Internal server error

Internet Explorer

If you restart the World Wide Web Publishing service on the Exchange Server 2003 SP1 front-end server, the problem is temporarily resolved.



CAUSE
This problem occurs if Microsoft Internet Information Services (IIS) and DAV incorrectly interact. In this situation, DAV enters an unexpected state and crashes.



Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
You must have Microsoft Exchange Server 2003 Service Pack 2 (SP2) installed to apply this hotfix.

Restart requirement
You do not have to restart the 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.



MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

817903 New naming schema for Exchange Server software update packages

Additional query words: XADM

Keywords: kbqfe kbfix kbbug kbpubtypekc KB911971

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