Note: You will need an Office 365 Business Premium subscription to use Microsoft Bookings. Microsoft Bookings is an appointment scheduling app that helps you keep track of your bookings, your staff and your customers. You'll never miss an appointment. And you'll have fewer no-shows. With the Bookings app you can: View and manage your calendar. Create bookings or make changes to existing ones on-the-go. See real time availability of your staff members. Respond to customers quickly and easily. Quickly get directions to where your next booking is. Manage your customer list.