The Calendar Booking feature allows people to book time on calendars using a form submission. Users can book appointments with internal staff, or even book time with equipment or locations.
Supported Providers
Gmail
Office 365
Outlook
iCloud
Instructions
Navigate to Advanced Tools and select Calendar Bookings

Click the Add Provider button in the bottom right corner

Select the provider and follow the instructions to log in to your account

Note:
The steps will differ depending on the provider that you are using.