this evening I had some problems configuring Forefront UAG RC1 with Forefront TMG for a customer presentation next week.
After Forefront UAG was installed, the Forefront TMG Managed Control Service didn’t start anymore. This sounds like a well-known problem, when the Exchange Server 2007 Edge role was installed after a TMG installation, but this was not the cause of the problem in my special configuration. Due to an recently Windows domain change for the TMG machine, my Exchange Server leaved the old configuration of the Exchange Server 2007 receive connector unchanged which was responsible for my service startup problem
I wrote a short article how to resolve these problem: