Whiteboard use

I have exactly the same problem since Sunday. Everything worked well until Saturday and suddenly people besides me are no more allower to type on the board ... I'm also looking for suggestion. 

Hello! Thankyou for your feedback. Can you check to see what your account sharing setting is? Cloud sharing needs to be enabled and set appropriately for whomever you are attempting to collaborate with in a meeting (same or different accounts). If cloud sharing is disabled for that audience, then they will open the board in a temporary view only mode during the meeting.