I want to leave a meeting open all day for attendees and not host it. Can I do this without having a meeting host or presenter in the room? Or do I need to promote attendees to meeting host/presenters to prevent the room from shutting down? I don't want the attendees playing with the setting or even using the mic. Just a place to chat. So I'd prefer that they remain attendees. I tried this today and logged out to see if the room would stay open and it eventually gave a message that the meeting had ended after about 30 minutes.