Is it possible to have the MTR account automatically create meeting schedules from invitation emails containing the meeting URL as opposed to from requiring a meeting calendar item to be created?
For example, someone received an email from an external party which includes the meeting link, password, time, agenda, dial-in info, etc. Is there a way to allow the user to forward this to the room's address and have it create an appointment that shows on the MTR display?
Yes it is possible, a user can forward an external meeting to an MTR account. But since it is an external user that created the meeting you have to enable ProcessExternalMeetingMessages for the room mailbox. You do this with Set-CalendarProcessing.