Very recently I started toying around with UAG (Unified Access Gateway)  2010. Right after installing and following step 1 of the wizard (select your Internal Network) I decided to change my subnets. Changing network adapters to another subnet is easy, however my UAG configuration fun was halted for some reason:

In words:

The UAG configuration cannot be retrieved from Forefront TMG storage. An error has occurred and UAG will close. Check that TMG services are running. If the UAG server is a domain member, verify connectivity to the domain controller.

Luckily I know TMG (Threat Management Gateway). The UAG manages this TMG instance for you by letting you complete various wizards. I couldn’t access the UAG console but the TMG console launched just fine. This allowed me to change the Internal Network definition:

After a reboot I was able to launch the UAG console. Promptly it presented me the following question:

In my opinion that should rather be an OK box than a yes/no prompt as the no option sounds rather unpleasant…

And now we’re off the discover what’s UAG all about!