Richard Hicks' Forefront TMG Blog

July 4,2012 – Update: A script is now available on ISATools.org that will identify the exact order in which to install TMG SP2 for your environment. You can download the script here.

To successfully install Service Pack 2 (SP2) for Forefront TMG 2010, you must first install Service Pack 1 (SP1), then Software Update 1 for SP1 (SP1U1) as I indicated in a previous blog post. None of the other hotfix rollups available for Forefront TMG are required to upgrade to SP2. For Forefront TMG 2010 enterprise arrays, these updates must be installed in a specific order to eliminate potential conflicts. The proper sequence is as follows:

First, install SP1 for Forefront TMG 2010 on the…

1. Enterprise Management Server (EMS)
2. Reporting server in each array
3. Remaining array members in each array

Next, install Software Update 1 for Forefront TMG 2010 SP1 on the…

1. EMS
2. Reporting server in each array
3. Remaining array members in each array

Lastly, install SP2 for Forefront TMG 2010 on the…

1. EMS
2. Reporting server in each array
3. Remaining array members in each array

For standalone arrays, treat the array manager as the EMS and follow the order outlined above. In addition, if you are adding a new array member to an existing array, install Forefront TMG 2010 and apply the updates in order before joining the array. Make certain that the new array member is at the same update level as the EMS and other array members.  Also, consider slipstreaming SP2 with your installation media to save yourself some time.

Special thanks to Jim Harrison for clarification on the installation order.