FIX: You cannot use an ISAPI filter to change the uri-stem field or the cs-user field in an IIS 7.0 log

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SYMPTOMS

When you try to use an ISAPI filter to set IIS log parameters in Internet Information Services (IIS) 7.0, you cannot change the cs-uri-stem field or the cs-username field in an IIS log. Additionally, incorrect strings appear in the cs-uri-stem field and in the cs-username field.

Note This problem does not occur in earlier versions of IIS.

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CAUSE

This issue occurs if the HttpFilterProc function of the ISAPI filter processes the SF_NOTIFY_LOG notification and changes the HTTP_FILTER_LOG structure. Because of an issue in IIS 7.0, these changed fields are not correctly reflected in the IIS log.

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RESOLUTION

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:

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

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

You must have Windows Vista Service Pack 1 or Windows Server 2008 installed to apply this hotfix.

Restart requirement

You do not have to restart the 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.