Roll Call
A roll call is a quick way to get a headcount without creating a full event. Roll calls require only a few details: a name, a check-in window duration, a location, and recipients. Roll calls can include any participants in the Subject, regardless of Group assignment, and can be scheduled for later in the same day.
Administrators can monitor check-ins live or review a summary when the check-in window closes. Completed roll calls remain on the calendar with a unique icon 
to identify them.