We have restrictions policies for several built-in apps that we don't use like Mail/Calendars/Siri/etc.
On macOS 10.12.2 using NetBoot to bare-metal image test machines we're seeing that when a user logs in for the very first time they're getting Restrictions prompts for these apps. We're not doing anything to start them, so i'm assuming Sierra tries to start them automatically for one reason or another.
Ultimately, it'd be good to have the system stop trying to run these apps. Does anyone know how to do that without deleting them? We generally don't delete built-in apps just to be safe, but don't want standard users using them, and don't want the system to keep trying to run them.