we don't allow AppStore at school, students download applications from the selfService. Netflix is not on the list of allowed apps, but students are able to download the app from an Apple TV. Do you know this function and how to deactivate it? thank you
I suspect they aren't actually installing the app if you have "Allow use of iTunes Store (supervised only)" deselected in your configuration profile. They could just be creating a web clip to the Netflix web page which looks like an app. If you want to stop Netflix, you may need to block it in your filters or firewalls.
This will give you a little more background:
Take a look at the following restriction:
Allow installing apps using Apple Configurator and iTunes (iOS 9 or later) /Allow installing apps using App Store (iOS 5–iOS 8 on...
and if they are clever
Allow trusting new enterprise app authors
as a start.
If you already haven't found it yet, you can block access to the apple TV app on the iPads as well as apple arcade app in your do not allow some apps sections of your restrictions profile. We had the same experience here at our school, and after asking a few kids one finally explained how they were getting the apps.