Ignore Bad Oof Rule registry parameter has been set

[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at http://go.microsoft.com/fwlink/?linkid=34707.]  

Topic Last Modified: 2007-01-08

The Microsoft® Exchange Server Analyzer Tool reads the registry of the Exchange Server computer to check for the presence of the Ignore Bad Oof Rule registry entry. This registry value is present at:


If the Exchange Server Analyzer finds the Ignore Bad Oof Rule registry entry present and configured with a value of 1 or greater, a non-default configuration message is displayed.

The Ignore Bad Oof Rule registry entry is a configuration setting for Exchange 2000 Server Exchange Server 2003, and Exchange Server 2007 designed specifically to work with the hotfix described in the Microsoft Knowledge Base article 828875, "You cannot move an Exchange mailbox after you use the Exmerge.exe utility" (http://go.microsoft.com/fwlink/?LinkID=3052&kbid=828875).

When the Microsoft Exchange Mailbox Merge program (Exmerge.exe) is used to move messages and other items from a mailbox on one mailbox store to a mailbox on a different mailbox store, a subsequent attempt to move the second mailbox may fail. This can occur because of a bad out-of-office (OOF) rule on that mailbox. If you want, you can revert to the default configuration by using the procedure outlined here.


This article contains information about how to edit the registry. Before you edit the registry, make sure that you understand how to restore the registry if a problem occurs. For information about how to restore the registry, view the "Restore the Registry" Help topic in Regedit.exe or Regedt32.exe.

To revert to the default configuration

  1. Open a registry editor, such as Regedit.exe or Regedt32.exe.

  2. Navigate to: HKLM\System\CurrentControlSet\Services\MSExchangeIS\ParametersPrivate

  3. In the right pane, locate and delete the Ignore Bad Oof Rule value.

  4. Close the registry editor and restart the Microsoft Exchange Information Store service for the change to take effect.

Before you edit the registry, and for information about how to edit the registry, see the Microsoft Knowledge Base article 256986, "Description of the Microsoft Windows Registry" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=256986).