Opening Zoom Meeting in lieu of sheduled host

[eyore15]

I administer an on-line learning system where instructors meet with students via Zoom.

Recently, an instructor was unable to initiate the Zoom meeting at the last minute.  Students had already logged in to the instructor's "room" and were waiting for the instructor to open the meeting. 

The instructor was unavailable.  Since students were waiting and ready,  I wanted to open the room so students could "attend" class.

I was unable to find a way to open the room.

Is there a process whereby I can open an instructor's room on their behalf? The situation was exacerbated by the short notice unavailability; the scheduled insructor was not able to asign the room to another user.

tia

mm