My understanding is that you must have an iCloud account to share notes, which means you should be able to create a configuration profile that disallows Notes being stored in iCloud. To do this you can set up a Permissions configuraton profile, and then uncheck "Allow iCloud Notes" under the Functionality tab. You may also want to disable AirDrop/other sharing services at the same time should they decide to start doing that instead.
Hello nashenbrenner, thanks a lot, it's exactly what i'm looking for. I actually don't find the line "Allow icloud Notes". Could you help me ?
I use Jamf PRO and i look in : devices / configuration profile / new / restrictions / fonctionnality - it's the good path ?