You experience problems after you apply hotfix 931978 or security update 931832 (MS07-026) to an Exchange 2003 SP1 server

After you apply hotfix 931978 or security update 931832 (MS07-026) to a server that is running Microsoft Exchange Server 2003 Service Pack 1 (SP1), you experience one or more of the following symptoms

�	Some messages remain in the local delivery queue on the Exchange 2003 server. Additionally, the following event is logged in the Application log: Event Type: Warning Event Source: MSExchangeTransport Event Category: Exchange Store Driver Event ID: 327 Description: The following call : EcLocallyDeliverMsg to the store failed. Error code : -2147024809 (Message-ID <xxxx>). MDB : xxxx. FID : xxxx
�	Some messages in the Inbox or in other folders cannot be opened.
�	If you move a mailbox, the From lines of some messages in that mailbox are lost.

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: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:

Prerequisites

Because of file dependencies, Exchange 2003 SP1 must be installed on the server before you apply this hotfix. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Restart requirement

There are no prerequisites for installing this hotfix. However, the following services are automatically restarted when you apply the hotfix:

�	The Microsoft Exchange Information Store service
�	The Microsoft Search service
�	The IIS Admin Service and all dependent services

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

This hotfix may not contain all the files that you must have to fully update a product to the latest build. This hotfix contains only the files that you must have to correct the issues that are listed in this article.

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.

File name	File version	File size	Date	Time
Mdbmsg.dll	6.5.7236.0	3,269,632	17-May-2007	19:33
Redir.asp	Not applicable	3,304	03-Feb-2007	06:44
Store.exe	6.5.7236.0	5,201,920	17-May-2007	18:27

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

You may experience the same problem when you apply hotfix 930241 to a server that is running Microsoft Exchange Server 2003 Service Pack 2 (SP2). To resolve this problem, apply hotfix 934450 to the Exchange 2003 SP2 server. For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base: