Room Bookings: How to enable Automatic Processing but disable Auto-Deletion of event updates?

Hey Everyone,

I work in IT, and have a client who would like their Meeting Room bookings to be automatically responded to, depending on whether there is a conflict or not. *This part works fine.*

The problem is that any email about the event is automatically sent to deleted items.

I've created an isolated test environment to try and find a resolution to this problem. This is the current setup. I've created a brand new room with 0 delegates, to avoid any users local rules impacting the mailbox. I have disabled "Settings>Calendar>Events and Invitations>Delete invitations and responses that have been updated". through the outlook web app.

If anyone has a solution could you please let me know. That would be great.

Thanks,

- Gabriel