Microsoft KB Archive/909989

= Error message when you log on to Outlook Web Access on an Exchange Server 2003 front-end server: &quot;401&quot; =

Article ID: 909989

Article Last Modified on 10/30/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Service Pack 2

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SYMPTOMS
When you log on to Microsoft Outlook Web Access on a Microsoft Exchange Server 2003 front-end server, you receive a 401 error message.



CAUSE
This issue may occur when the back-end server name on which the mailbox resides is not in the Exprox cache on the Exchange Server 2003 front-end server.

By default, the Exprox cache on the Exchange Server 2003 front-end server holds the information for the Exchange Server 2003 back-end server. When the Exchange 2003 front-end server builds the Exprox cache, it uses the Directory Service Access (DSAccess) process to build a list of objects that has the msExchPrivateMDB attribute or the msExchPublicMDB attribute. If the value of the msExchPrivateMDB attribute is more than one thousand, the Exprox cache may not be completed during the DSAccess process.



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
Because of file dependencies, this hotfix requires Microsoft Exchange Server 2003 Service Pack 2 (SP2).

Restart requirement
You must restart the computer after you apply this software update.

Hotfix replacement information
This hotfix does not replace any other software updates.

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 item 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 about the Microsoft Exchange Server 2003 Service Pack 1 version of this fix, click the following article number to view the article in the Microsoft Knowledge Base:

899902 Users receive a 401 error message when they try to access a mailbox that is in an Exchange Server 2003 front-end server by using Outlook Web Access

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

Keywords: kbqfe kbfix kbbug kbexchange2003presp2fix kbpubtypekc KB909989

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