Center availability show by the restrictions on the appointment creation setting
The center has the setting turned on that they do not accept appointments with 24 hours of the appointment. So a student will see the open slot today at 1pm and show up there and try and do a walk in cause they see the slot is open. Is there a way to hide or block out the appointment slots that are within that 24 hour period that they have set?

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AdminMon Nasser (Admin, Accudemia) commented
Actually a few users take advantage of this and direct walk-ins to come back at during open slots. Once center even prints out the daily schedule every morning and use the print out as a guide on when to tell students who need that service or tutor to walk in.