Update Attendance Constraints
From the Admin area of your app choose Attendance Tracking Modes
From the Attendance Tracking dashboard page, you can select Update Attendance Constraints button to adjust the check-in time limit and require evaluations.(note: if you chose these options, it will apply to all your sessions requiring check-ins)
After clicking on the button for Update Attendance Constraints, you can decide whether to enter a time limit before attendees can check-in to a session. You can also decide if evaluations will be required for check-out, this will only affects the attendees who have not filled out the evaluation yet.