You can talk to people who are using the system in the following thread (this is a clickable link)
I think the question is what is causing the ADT alarm event. If it is one of the sensors, then you will be able to use those as you described, because the ADT SmartThings dual logo sensors do show up on your sensor list for the home automation events. So essentially you would create A separate home automation rule so that when that sensor is triggered, then your power outlet turns on. You aren’t including the home automation devices in the ADT event, but you are using the same sensor to trigger both.
Basically the smartthings single logo sensors cannot be used to trigger a call to the ADT monitoring center. Only the dual logo sensors can do that. However, the dual logo sensors can be used to trigger an event On the home automation side using the official smart lights feature or a routine.
So it’s going to come down to small details as to whether it is possible or not.
But again, verify with someone who actually has the system in the following thread: