Consider the following scenario:

  • You create a HTTP deny rule in an enterprise policy in Forefront Threat Management Gateway (TMG) 2010.

  • You add URL categories to this rule.

  • You use the Allow user override setting, and then you try to apply the changes for this rule.

In this scenario, you receive an error message that resembles the following:



This issue occurs because of a code error in Forefront TMG 2010.


Update information

To resolve this issue, install the software update that is described in the following Microsoft Knowledge Base (KB) article:

2498770 Software Update 1 rollup 3 for Forefront Threat Management Gateway (TMG) 2010 Service Pack 1


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 software update terminology, 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

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