Permissions on a target mailbox store may be overwritten when you use the dial tone database recovery procedure and the Mail Merge task in Exchange Server 2003

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322756 How to back up and restore the registry in Windows
Consider the following scenario. You use the dial tone database recovery procedure in Microsoft Exchange Server 2003. You use the Mailbox Merge task to update the recovered mailboxes with content that was created during the restore and recovery procedure.

After you use the Mailbox Merge task, the folder permissions on the target mailbox store may be overwritten with permissions that exist on the source mailbox store.

Note For more information about the dial tone database recovery procedure, visit the following Microsoft Web site:

Hotfix information

A supported hotfix is 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 software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if 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. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


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

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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.
File nameVersionDateTimeSize
Maildsmx.dll6.5.7651.3718-Jul-200616:44 14,647,296
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More information
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

By default, the overwrite permissions feature is enabled when you merge your dial tone database to a production database. However, you can use the KeepTargetFolderACL DWORD value to enable or to disable the overwrite permissions feature.

The KeepTargetFolderACL DWORD value is located in the following registry subkey:
Note If the RecoverMailbox subkey is not listed under MSExchangeAdmin, you must create this subkey.

If the KeepTargetFolderACL DWORD value does not exist, or if it exists but the value is 0, the merge process overwrites the permissions on the target folder. However, if the KeepTargetFolderACL value exists and has a nonzero value (such as 1), the permissions on the target folder are retained.

For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
817903 New naming schema for Exchange Server software update packages
Merge backup recovery storage group

Article ID: 923117 - Last Review: 01/15/2015 01:21:49 - Revision: 7.0

  • Microsoft Exchange Server 2003 Standard Edition
  • Microsoft Exchange Server 2003 Enterprise Edition
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