As a host, you can end a meeting by selecting Meeting > End Meeting. This gives you an opportunity to customize a closing message for the attendees and direct them to another URL for further information.
If the host ends a meeting by selecting Meeting > Exit Acrobat Connect or by simply closing the meeting room window, the meeting stays open for other attendees, who can continue to collaborate for 10 minutes. After 10 minutes, they are notified that the meeting room will close in 1 minute.