Have your IT team enforce it? If you don't have centralized management of your computers then you're probably small enough to go around to everybody and say, "install this".

Currently, any changes made without the extension won't be tracked. For some services, we will eventually be able to capture the delta anyways, if they have API access to their own configuration. This, however, is still sub-optimal because you lose out on the commit message and the opportunity to capture the intent behind the change at the time that it's being made.

Our hope is that much like policies around code review, where often you can commit to master, but by policy you don't and request a review first, your coworkers will see the value in everyone contributing so that everyone is kept aware and the log is maintained.