You probably noticed this already in your endeavors with UAG — the activation process completes and the console notifies you with the pop-up, but the changes you made don't appear to have taken effect. In fact, they always do take effect, but only a few minutes after the pop-up is shown. What actually happens is that the activation itself finishes, but the TMG side of the house remains busy synchronizing data with TMG storage, and that can take an additional 2 to 3 minutes. The more intricate the configuration the longer this takes, and if you don't wait those extra minutes, you'll probably notice that changes have not taken effect, but at the same time you will not be able to reactivate until the sync has completed. Those making the odd change from time to time can simply activate and wait a few minutes, but when faced with countless activations, a much better option is to enable informational messages.
This configures UAG to display more detailed information...