Cookies from a published Web site are randomly lost after you publish an application that uses forms-based authentication in ISA Server 2004

You use Microsoft Internet Security and Acceleration (ISA) Server 2004 to publish a Web site that uses forms-based authentication (cookieAuth) to authenticate client computers. After you do this, ISA Server 2004 randomly removes the Set-Cookie command that the Web server sends to client computers. Therefore, cookies from the published Web site are randomly lost.

This problem occurs when the ISA Server 2004 Outlook Web Access forms-based authentication filter renews the encryption key. The Web server's cookie is lost when ISA Server 2004 sets the ISA Server 2004 cadata cookie and the sessionid cookie. ISA Server 2004 sets these cookies after ISA Server 2004 renews its encryption key.

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

You must have ISA Server 2004 Service Pack 2 (SP2) installed to apply this hotfix. For more information about how to obtain this service pack, see the "More Information" section.

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 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.

ISA Server 2004, Standard Edition

ISA Server 2004, Enterprise Edition

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

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