Outlook Bookings Page Error: Staff Calendars Not Loading

Question

I came across this issue today where none of my staff calendars are loading. This booking page has been working for months and all of a sudden it is not. I have been through a series of events trying to fix the issue on my end but I think it is a Microsoft glitch.

Any advice or reset would be appreciated.

Answer 1

Dear @Maddie Hession,

Good day, and thank you for providing a detailed description of the issue you’re experiencing with your Outlook Bookings page. As a forum moderator, I genuinely wish I could directly access your account or delve into the backend systems to diagnose and fix this for you. However, our role here is limited to providing general guidance and solutions that can be applied by users. From my research, this is a relatively common issue with Microsoft Bookings and is often caused by a temporary synchronization problem between Bookings and the staff members’ Outlook calendars.

Please try the following steps to see if they help resolve the issue:

1.Quick Browser & Cache Fixes 

• Refresh the page a few times (Ctrl + F5 for hard refresh).
• Try in an Incognito/Private window.
• Clear your browser cache and cookies for office.com / outlook.office.com.
• Switch to a different browser (Edge > Chrome or vice versa) and test.

2.Toggle the Calendar Sync for Each Staff Member 

This resets the connection between Bookings and each person’s Outlook calendar:

1. Go to your Bookings page in Microsoft 365 (bookings.microsoft.com or via Outlook app launcher).
2. In the left menu, click Staff.
3. Click on each staff member one by one
4. In their profile, go to the Availability section.
5. Uncheck the box: “Events on Office calendar affect availability”.
6. Click Save.
7. Wait 30-60 seconds.
8. Go back in, re-check the box, and Save again.

Repeat for every staff member who shows “Loading...”.

After doing this for all affected staff, go back to your public booking page and test the Select Staff dropdown again.

If the issue persists

• Allow some time (around 1-2 hours) and test again, as backend synchronization may take time to stabilize.
• As a temporary workaround, consider setting staff selection to “Anyone” (if appropriate), or temporarily disabling staff selection for the affected service.

 I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this. Thank you for your patience and understanding. If you have any questions or need further assistance, please feel free to share them in the comments so I can continue to support you. I'm looking forward to your reply.

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Answer 2

Based on the available information, the following checks and fixes are supported:

1. Verify each staff member’s calendar sharing
   • Each staff member must share their calendar so Bookings can read free/busy.
   • Have each staff member:
     1. Sign in to Microsoft 365 and open Outlook on the web.
     2. Select Share > Calendar at the top of the page.
     3. In People inside your organization, set My Organization to Can view when I’m busy.
     4. Select Done.
   • This ensures Bookings can sync and load their availability.
2. Confirm Bookings is allowed to use calendar availability
   • In the Bookings web app, open the affected booking calendar.
   • Go to Staff.
   • For each staff member, open Staff details and make sure Events on calendar affect availability is checked. This is required for Bookings to read their calendar and show open slots.
3. Remove departed staff from Bookings calendars
   • If any staff have left the organization and their Microsoft 365 accounts were removed, they must also be removed from all Bookings calendars or they can cause selection/sync issues:
     1. In Microsoft 365, go to Bookings > Staff.
     2. Hover over the departed staff member and select the Delete icon.
     3. Confirm with OK.
     4. Repeat for every Bookings calendar if more than one exists (use the calendar picker under the company name to switch calendars).
4. Treat transient sync errors as temporary
   • Some calendar sync problems are transient and caused by connectivity or backend issues. These typically resolve themselves after a short time. If the “Loading…” state persists for an extended period despite the steps above, it is likely a backend issue.
5. Escalate to Microsoft support if the issue persists
   • If calendars still show as “Loading…” after verifying sharing and staff settings and waiting for transient issues to clear, contact Microsoft 365 support from the Microsoft 365 admin center so engineering can check tenant‑level Bookings and calendar logs.

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References:

• Shared Bookings Frequently Asked Questions (FAQ)