Microsoft KB Archive/841997

= Cryptographic signatures are not successfully validated when you use CDOEX to configure a transport event sink in Exchange Server 2003 =

Article ID: 841997

Article Last Modified on 10/25/2007

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APPLIES TO


 * Microsoft Exchange Server 2003 Standard Edition
 * Microsoft Exchange Server 2003 Enterprise Edition

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Important This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry



SYMPTOMS
Cryptographic signatures are not successfully validated when the following conditions are true:
 * You are using Microsoft Exchange Server 2003.
 * You use Microsoft Collaboration Data Objects for Microsoft Exchange Library (CDOEX) to configure a transport event sink.
 * The transport event sink handles incoming e-mail messages and validates cryptographic signatures.



CAUSE
This problem occurs because CDOEX alters the S/MIME content of the message in the transport event sink. Therefore, the S/MIME validation of the cryptographic signature is not successful.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
To install this hotfix, you must have Exchange Server 2003 Service Pack 1 installed on your computer.

Restart requirement
You do not have to restart your 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) 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 tool in Control Panel.   Date         Time   Version      Size       File name -  23-Jun-2004  04:33  6.5.7232.4   3,926,016  Cdoex.dll Warning If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.After you apply this hotfix, you must add the CDOHighFidelityInSinks entry to the registry:
 * 1) Click Start, click Run, type regedit, and then click OK.
 * 2) Locate and then click the following registry subkey:
 * 3) Right-click Parameters, point to New, and then click DWORD Value.
 * 4) Type CDOHighFidelityInSinks, and then press ENTER.
 * 5) Right-click CDOHighFidelityInSinks, and then click Modify.
 * 6) In the Value data box, type 00000001, and then click OK.
 * 7) Quit Registry Editor.



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 additional information about terms and about file naming conventions, 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

817903 New naming schema for Exchange Server software update packages

Additional query words: incomplete invalid non-validated MIME multipurpose internet mail extensions

Keywords: kbqfe kbhotfixserver kbexchange2003presp2fix kbfix kbbug KB841997

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