Problems with sync of my calendar

Question

Since a long time, my colleagues does not see all the meetings in my calendar. There are just a few for all of them.

I can see all the meetings on different devices (Mac, Windows, iPhone).

But to make an appointment with me is awfull at the moment. People think I'm free but my calendar is aleady blocked. This need a lot of follow up questions.

Sync with calendly for example works fine.

Answer 1

Hi Dom

Thank you for reaching out to the Q&A Forum.

Based on your description, I would like to share some information that I hope will help.

Since Calendly (which connects via API) can see your meetings, but your colleagues (using Outlook) cannot, I understand the data exists on the server. The issue is specifically with the availability service not presenting your status correctly to internal users.

Here are some recommended steps you can try:

Test "OWA" to see if the problem is your mailbox or your colleagues' computers. You can ask a colleague to log in to Outlook on the Web and try to create a new event, then open the Scheduling Assistant and look up your name.

If they see your busy times in the web browser (blue box): The issue is not your account. The issue is their Outlook Desktop App

If they do not see your busy times in the web browser: The issue is with your mailbox permissions.

Even if permissions look correct, the metadata can get corrupted. You need to force Exchange to refresh this list.

• Go to Outlook on the Web > Calendar > Right-click your primary Calendar > Sharing and Permissions.
• Locate "People in my organization" and change the setting to "Not shared" > Save > Wait a few minutes then change the setting back to "Can view when I'm busy" > Save.

If the steps above do not work, the permissions are likely stuck at the backend level. You may ask your IT Administrator to use Exchange Online PowerShell to hard-reset the default Access Control List (ACL) by running PowerShell.

(Set-MailboxFolderPermission (ExchangePowerShell) | Microsoft Learn)

I hope this information proves helpful,

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Answer 2

It sounds like you are experiencing a syncing issue with your calendar in Exchange Online, where your colleagues are unable to see all your meetings. This can happen for several reasons, including a corrupted ActiveSync relationship or issues with third-party add-ins that might interfere with calendar synchronization.

To troubleshoot this issue, you can try the following steps:

1. Re-create the ActiveSync relationship on your mobile device and any other devices you use. This can often resolve syncing issues.
2. Disable any Outlook add-ins that may be affecting calendar items, especially if they are related to scheduling or conference rooms. You can re-enable them after confirming that the issue is resolved.
3. Restart your devices after making these changes to ensure they take effect.
4. If the problem persists, consider checking if there are any known issues with the version of Outlook you are using or if there are updates available that might address the syncing problem.

If these steps do not resolve the issue, you may want to reach out to Microsoft support for further assistance.

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References:

• Calendar on mobile device isn't synced to the calendar in an Exchange Online mailbox when you use Exchange ActiveSync