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When a user or a program tries to access a Web site through a computer that is running ISA Server 2004 Service Pack 2, some of the site's content is unavailable.
When this symptom occurs, the following event is recorded in the event log on the computer that is running ISA Server 2004 SP2:
Event Type: Warning Event Source: Microsoft ISA Server Web Proxy Event Category: None Event ID: 23004 Date: Date Time: Time User: N/A Computer: Computer_Name Description:ISA Server was unable to process a response body from /Path. The server supplied a compressed response although ISA Server did not request compression. The response was discarded.For more information, see Help and Support Center at http://support.microsoft.com.
This issue occurs if the following conditions are true:
The user tries to access a Web site that sends compressed HTTP responses.
ISA Server 2004 is configured not to request compressed HTTP responses from servers.
When a compressed response is received in this scenario, ISA Server 2004 denies the response.
To resolve this issue, obtain the update for HTTP issues in ISA Server 2004 SP2. For more information about this update, click the following article number to view the article in the Microsoft Knowledge Base:
916106 Update for HTTP issues in Internet Security and Acceleration Server 2004 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.