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How to Make Microsoft Bookings Time Slots Unavailable After Booking

Camila Milosovich Sep 29, 2026 869 views

Question details

The user needs to prevent multiple customers from booking the same time slot by making it unavailable once selected.

How to Make Microsoft Bookings Time Slots Unavailable After Booking

Product: Microsoft Bookings
Device & OS: not provided
Scenario: Configuring booking availability and preventing double bookings for a delivery or appointment service.
Observed behavior: Customers need the scheduling system to automatically block out time slots that have already been selected for delivery or service.

Before you start

Ensure you have administrator access to your Microsoft Bookings calendar to modify service settings and availability windows.

Solution 1Recommended

Configure Service Duration and Buffer Time

Adjust your service settings so that fully booked time slots are automatically removed from your public availability page.

Microsoft Bookings naturally removes a time slot when its available capacity is fully booked. By accurately configuring your service duration and capacity limits, you ensure no double bookings occur.

Access Bookings Services

Open Microsoft Bookings and navigate to the 'Services' tab from the left-hand menu.

Select the Service

Click on the specific delivery or appointment service you want to edit.

Adjust Service Duration

Set the exact service duration and booking increments to ensure each delivery fully occupies the required time block.

Set Maximum Attendees

Ensure the 'Maximum attendees' is set to 1. This guarantees the slot becomes completely unavailable after a single booking.

Enable Buffer Time

Toggle the 'Buffer time your customers can't book' option if you need additional blocked time before or after a booking for travel or preparation.

Save Changes

Click 'Save' at the top of the page. Once a customer books this service, the system will automatically remove the slot from the availability calendar.

Configure Service Duration and Buffer Time

Verification: You can verify this configuration by visiting your public Booking page and scheduling a test appointment. The selected time should immediately disappear from the available options.

Solution 2

Limit Availability to One Booking Per Date

Use this method if you only want to accept a single appointment or delivery per day for a specific service.

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Frequently Asked Questions

Why are my time slots still showing as available after someone books?

This usually happens if your 'Maximum attendees' is set to higher than 1. Check your service settings in Microsoft Bookings and ensure the capacity is set to 1 so the slot closes after a single booking.

Can I block off time between Microsoft Bookings appointments?

Yes, you can use the 'Buffer time' feature within your service settings. This allows you to automatically block out a specific amount of time before or after an appointment for preparation or travel.

Does Microsoft Bookings sync with my personal calendar to block time?

Yes, if you enable the 'Events on Office calendar affect availability' option for your staff members, any busy time on their linked Outlook calendar will automatically make those slots unavailable in Bookings.

How do I block off holidays or entire days in Microsoft Bookings?

You can block off entire days by going to the 'Calendar' tab in Bookings, clicking 'Time off', and specifying the days your business is closed. This automatically removes availability for all services during that period.

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