Click the My Account tab (you may be asked to login in).
Click on the button on the My Account page.
Select a report option from the list.
Select a date range for the report (if required) and click the Go button.
From the Reports List you can click the Title of any specific session to see the details of the session.
The session details include attendees, start time, the browser and operating system they were using, the client they joined with, and the duration each attendee was in the session.