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FIX: Exchange servers fail Kerberos authentication server requests on Windows 2000-based servers

This article has been archived. It is offered "as is" and will no longer be updated.
On Microsoft Windows 2000-based servers, Exchange servers fail Kerberos authentication server requests when the computer account password is changed against Kerberos Key Distribution Centers (KDCs) in the network environment. Kerberos authentication server requests are also known as KRB_AS_REQ messages. The following Event message appears in the Security log on domain controllers:

Event Source: Security
Event Category: Account Logon
Event ID: 675
Pre-authentication failed:
User Name: <ExchangeServer>$
User ID: <user sid>
Service Name: krbtgt/<domain>
Pre-Authentication Type: 0x2
Failure Code: 0x18
Client Address: <ip address>

This scenario can also cause unnecessary traffic on the domain controllers and delays on the mail servers. Additionally, user passwords are automatically changed every 30 days by default.
This problem occurs because there is a problem in Windows 2000.

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.

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, submit a request to 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.


No prerequisites are required.

Restart requirement

You must restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

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 nameFile versionFile sizeDateTimePlatform
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
More information
For more information about how hotfix packages are named, click the following article number to view the article in the Microsoft Knowledge Base:
816915 New file naming schema for Microsoft Windows software update packages
For more information, 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

Article ID: 888612 - Last Review: 11/02/2013 18:00:00 - Revision: 3.0

Microsoft Windows 2000 Server, Microsoft Windows 2000 Professional Edition, Microsoft Windows 2000 Advanced Server

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