The SPN list on the front-end server is not updated when you follow the steps in Knowledge Base article 920209 to deploy Kerberos Constrained Delegation in an Exchange 2003 front-end and back-end environment

When you follow the steps in Microsoft Knowledge Base article 920209 to deploy Kerberos Constrained Delegation (KCD) in a Microsoft Exchange Server 2003 front-end and back-end environment, the Server Principle Name (SPN) list on the front-end server is not updated. This problem occurs if a back-end server is down for some reason. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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

Microsoft Exchange Server 2003 Service Pack 2 (SP2) must be installed before you apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix. However, the Microsoft Exchange System Attendant, the Microsoft Search service, the IIS Admin Service, and all dependent services are restarted when 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.

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

To verify the SPN list of the front-end server, use the Active Directory Service Interfaces (ADSI) Edit tool (Adsiedit.msc). To do this, follow these steps:

1. Start the ADSI Edit tool. To do this, click Start, click Run, type adsiedit.msc, and then click OK.
   
   Note The ADSI Edit tool is part of the Windows Server 2003 Support Tools package. To install this package, double-click Suptools.msi in the Support\Tools folder on the Windows Server 2003 CD.
2. Right-click the computer object for the front-end server, and then click Properties.
3. On the Attribute Editor tab, examine the msDS-AllowedToDelegateTo entry in the Attributes list.

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: For more information about the naming schema for Exchange Server software updates, click the following article number to view the article in the Microsoft Knowledge Base:

For more information, click the following article number to view the article in the Microsoft Knowledge Base: