How do I ensure my unavailability shows up on a Shared Bookings page?

Check the completed appointment’s assigned staff member first: a Shared Bookings service assigned to several staff can remain bookable while you are busy because Bookings may assign another available person.

1. Determine who was actually booked

Open Bookings → Shared booking pages → your page → Calendar, select the test appointment, and inspect the assigned staff member.

• Another staff member was assigned: your Outlook busy time worked for you, but the service remained available through that person. For a service configured to assign any selected staff member, Bookings schedules one available member. If Multiple staff is selected instead, all assigned staff must be available.^1^
• You were assigned despite being busy: continue with the checks below.

To require bookings specifically with you:

1. Go to Services → select the affected service → Assign staff.
2. Either remove other staff from that service or enable Allow customers to choose a particular staff for booking.
3. Save, reopen the public booking page in a private browser window, explicitly select yourself, and retest.

2. Check whether this is a group-capacity service

Under Services → affected service → Basic details, inspect Maximum attendees per event.

If it is greater than 1, the service is a 1:N/group service. The same time, staff member, and service remain bookable until the configured attendee limit is reached.^1^

For ordinary one-to-one appointments, set Maximum attendees per event to 1, save, and retest.

3. If the appointment was assigned to you

Since you have already worked through the usual availability recommendations, focus on these discriminating checks:

• The conflicting Outlook event must be on your primary Microsoft 365 calendar, rather than a shared or secondary calendar.
• Its Show as value must be Busy or Out of Office. A closely matching Shared Bookings case notes that an event shown as Busy should make the selected staff member unavailable.^2^
• Under Bookings → Staff → your staff record, Events on Microsoft 365 calendar affect availability must be enabled. Microsoft documents that this setting makes calendar free/busy information affect service availability and recommends leaving it enabled to prevent double-booking.^3^
• Confirm that the service’s Availability options do not intentionally expose a different schedule. Staff business hours and custom availability determine the outer bookable schedule, while calendar free/busy blocks conflicts inside that schedule.^4^

Also compare the Shared Bookings business time zone with the time shown to the person testing. Bookings stores configuration in the business time zone but can display slots in the visitor’s local time zone.^5^

4. Conditional permission check

If Bookings reports “This staff member’s calendar can’t be synced,” share free/busy information from Outlook:

1. Open Outlook on the web.
2. Select Share → Calendar.
3. Under People inside your organization, set My Organization to Can view when I’m busy.
4. Select Done.^5^

If the appointment still assigns you over a Busy event after these checks, capture the service’s Assign staff, Maximum attendees, your staff availability settings, and the Outlook event’s calendar and Show as value. Have the Microsoft 365 administrator open a support request from the Microsoft 365 admin center so the Bookings mailbox and free/busy lookup can be examined.

References

1. Define your services in Shared Bookings
2. My bookings page is allowing customers to book appointments when I am busy - Microsoft Q&A
3. Add team members to Bookings
4. Adding staff availability in Microsoft Bookings
5. Shared Bookings Frequently Asked Questions (FAQ)