Scheduling and managing events using Outlook.com calendar
The only way I found is to stop emails from adding to your calendar altogether - settings, mail, accounts (deselect calendar) for now this is the only thing I have found helps. I’m reporting and blocking the emails daily (blocking also removes them from the calander but I’m not sure what risks there are with the ‘invite’ being on the calander for a while. Example if you don’t see the invite for 5/6 hours)