Article ID: 941293 - View products that this article applies to.
Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
When you access a Web site through Microsoft Internet Security and Acceleration (ISA) Server 2006 or Microsoft Forefront Threat Management Gateway, Medium Business Edition, you receive the following error message:
This problem may occur when you access a Web site that is published in ISA Server 2006 or Microsoft Forefront Threat Management Gateway, Medium Business Edition. This problem may also occur when you access a Web site through an HTTP access rule that is defined in ISA Server 2006 or Microsoft Forefront Threat Management Gateway, Medium Business Edition.
HTTP 400 - Bad Request
This problem occurs because ISA Server 2006 and Microsoft Forefront Threat Management Gateway, Medium Business Edition drop HTTP responses and HTTP requests if their HTTP headers contain continuation lines.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To resolve this problem, follow these steps:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 941293 - Last Review: August 4, 2008 - Revision: 3.1