You have to set the notification for each person who gets the proof to “decisions” when the proof is shared. You can also set default notifications for each user in the proofing tool admin setup, but the person creating and sharing the proof has to be trained to check to make sure it is set correctly each time. Every now and then someone’s notifications don’t get set to the default and I can’t quite figure out what triggers that change but 95% of the time it works properly.