Student continually deletes communication app

[LStuff]

I have a static group created that is used for my students communication app needs.  One of my students continually deletes the app from his iOS device.  How can I keep him from deleting the app?

Under device functinality - I do have Allow removing apps unclicked.

[mainelysteve]

You can do this on an individual basis just locate the app in your catalog and select "Prevent users from removing the app" or alternatively change the "Reinstall this app when it's removed by the end-user" setting to enable.