If you have a large array of servers that are running Microsoft Forefront Unified Access Gateway (UAG) 2010, configuration activation may fail on one or more of the array members. This problem occurs if activation takes longer than 10 minutes.
This problem occurs because Forefront Unified Access Gateway 2010 has a hard-coded activation time-out of 10 minutes. In a large array of servers, one or more of the array members may fail to become active if activation takes longer than 10 minutes. This problem would typically only be an issue in arrays that have six or more members.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.