How do I manage the number of attendees for an individual appointment?
For New Calendar users, the Scheduler tool is now optional. Please contact your Account Relationship Manager to enable it.
Note: Scheduler has already been enabled for those accounts that have been actively using it.
Add Appointment Details
Name the appointment , add a location , select the calendar for the appointment , and add a date and time slots  to your appointment.
You can view your appointment in the Scheduler.