An e-mail message is corrupted after the Disclaimer rule is enabled on an Exchange Server 2007 or 2010 server

Consider the following scenario:

• You have a mixed Microsoft Exchange Server 2003 and Microsoft Exchange Server 2007 or Exchange Server 2010 mail environment.
• The Disclaimer�rule is enabled on the Exchange 2007 or Exchange 2010 server.
• An e-mail message that is generated from Microsoft Office Outlook Web Access on Exchange 2003 is routed by using an Exchange 2007 or Exchange 2010 Server.

In this scenario, the e-mail message is corrupted. When this problem occurs, the e-mail message is shown as the following HTML format.

This problem occurs because Outlook Web Access for Exchange 2003 sets an e-mail message to an incorrect character set. When the message is routed by the Exchange 2007 or 2010 server that has the�Disclaimer rule enabled, the e-mail message is converted to incorrect HTML tagging based on the incorrect character set. Then, the message is corrupted by the incorrect tagging.

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.

Prerequisites

This hotfix requires Microsoft Exchange Server 2003 Service Pack 2 to be installed on the server because of file dependencies.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

Post-installation 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.
After you install the hotfix, you must create the DisableUnicodePrefix registry entry in order to enable the hotfix. To do this, follow these steps:

1. Click Start, click Run, type Regedit , and then click OK.
2. Locate the following registry subkey:
   HKLM\SYSTEM\CurrentControlSet\Services\MSExchangeWEB\OWA
3. On the Edit menu, point to New, and then click DWORD Value.
4. In the details pane, type DisableUnicodePrefix for the new value, and then press ENTER.
5. Right-click DisableUnicodePrefix, and then click Modify.
6. In the Edit DWORD Value dialog box, click Decimal under Base.
7. In the Value data box, type 1, and then click OK.
8. Exit Registry Editor.

If you are using a Non-English version server, you must extract the hotfix that is mentioned in KB 942919 and then replace �Microsoft.Exchange.OMA.UserInterface.dll component manually after you install the hotfix. To do this, follow these steps:

1. Downalod the hotfix in KB 942919 and unzip the hotfix to �Exchange2003-KB942919-x86.exe�
2. Run the following command in a command window to extract the Microsoft.Exchange.OMA.UserInterface.dll file.

   Exchange2003-KB942919-x86.exe /x

3. Replace the new �Microsoft.Exchange.OMA.UserInterface.dll� into the �..\Exchsrvr\OMA\browse\bin� folder.
4. Restart the computer.

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.

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

For more information about how to configure a disclaimer, visit the following Web site:
http://technet.microsoft.com/en-us/library/aa996585.aspx