Prevent user with delegation access to open an e,mail Protected with AIP

Karim Hossam Hey! I replied with a lot of info (thought it was a shared mailbox). I just now realized it's a delegate's access such as the assistant permission to an executive. You did not attach any link so maybe that's why I missed it. Anyway for your scenario they are "thinking about it".

https://office365.uservoice.com/forums/928576-microsoft-information-protection-mip/suggestions/33578686-prevent-fullaccess-delegated-users-to-read-protect