After clicking on "Accept Meeting Request" in Sharepoint, I get an error that says "Some items were not processed.
Unable to find the appointment in the calendar of room".  This does not happen for every meeting request, seems to be a random few.  But it is a problem when trying to reserve a meeting room and it doesn't allow you to.

If the problem is the appoint doesn't show on the meetingroom mailbox calendar,  Please confirm if the issue happens permanently with this room by booking the room again with another. Please check the inbox folder , deleted item folder and recover deleted items folder in the room, see where the meeting request went.

Regards.