You install the Forefront Threat Management Gateway (TMG) 2010 Enterprise edition on a domain controller. Or, you install the Forefront Threat Management Gateway (TMG) 2010 Standard edition on a workgroup computer.
You install Forefront TMG 2010 Service Pack 1 (SP1), and then you run a Repair operation.
You install Forefront TMG 2010 SP1 Update 1, and then you run the Repair operation again.
In this scenario, an enterprise node is incorrectly added in the Forefront TMG Microsoft Management Console (MMC). Additionally, a join operation on this enterprise node in the array does not work, and "EMS-managed array" is displayed under Config Management.
This issue occurs because custom actions in the Repair operation are scheduled incorrectly.
Note This issue was introduced in Forefront TMG 2010 SP1 Update 1.
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.
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
TMG 2010: SP1 Update1: After installing Update 1 and running TMG repair, Enterprise node is added in MMC console and cannot join the array