In order to manage TMG with powershell you need to use the FPC.root COM object. For more details you can read this article. The purpose of this script is to export for each TMG server the Firewall Policies in XML format:
We will describe in this post how to set up Threat Management Gateway in a domain located in the perimeter network (DMZ) in order to publish your Outlook Web Access external URL and ensure a secure SSL connection. The OWA site is installed on the CAS servers of your Exchange infrastructure. The internal URL, registered in your private DNS, is being accessed by the computers in your internal network which are members of your domain. The external URL, registered in your public DNS, is being accessed by any computer connected to the internet, which obviously is not necessarily a member of your domain. To get both internal and external URL launch the following command on the Exchange Management Shell:
Get-OwaVirtualDirectory | ft server,InternalURL,externalURL |
