First the notifications on the left side. Do you want to create a calendar entry for your employees? Activate the "Create a calendar entry?" button. If you'd like to remind your clients before the group meeting, click the "Send invitation reminder?" button and choose to be notified by SMS or email.
If you want your group appointment to be cancelable, add the cancellation link to the event confirmation and reminder. Specify the conditions and the cancellation period before the group appointment.
Click on "Next" to go to step 4.