We had been using Google Calendars appointment slots but it kept double booking no matter how I set it up. You must set up the actual appointment slots before others can book them. Select how long your appointment slots would be Then Select More Options By selecting on Does not repeat. appointments with me and they love how easy it is. Enter their username in the 'Add Guests' field (to the right of the 'Title' field).a professor might add a TA to appointments for office hours, but would NOT add a student). When adding someone to the appointments, s/he will be invited to every appointment so only add people who will be assisting with all the appointments (i.e. You can choose to set the time as a single appointment, or divide it up into smaller appointments by changing the setting for 'type'Īdding others to the appointments is not the same as inviting them to book an appointment.In the event box, click 'Appointment slots'.Click on the date you want to set the appointment slots for.There are several things you can do with appointment slots: Note: Appointment Slots are currently only available to Google Apps users (i.e., not to personal Gmail users).