Complex appointments
Complex appointments can be used if you, for example, need a staff member as well as a space for the booking of an appointment. This feature is available upward of the Grow-package.
Go to Settings > Extra Functionality and tick there the plug-in 'Complex Appointments' and afterwards click on 'Save' at the bottom of the page.
Subsequently, you go to the relevant appointment type and at 'Setup availability' you tick 'Appointment or reservation can only be made if multiple resources (staff, room, equipment) are available at the same time'. Choose the resources that are necessary for this appointment type by clicking on 'Add Group'.