New Teams Share Calendar issue

It sounds like you are experiencing an intermittent issue with the New Teams Share calendar where it disappears and reappears after restarting your computer. This could be related to connectivity issues between Teams and Exchange, or it may involve the settings within your Teams application or Outlook.

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

1. Check Connectivity: Use the Microsoft Remote Connectivity Analyzer tool to run a connectivity test for the Teams Calendar App. This can help identify any connectivity issues affecting your Teams calendar.
2. Update Teams: Ensure that you are using the latest version of Microsoft Teams, as updates often include bug fixes and improvements.
3. Clear Cache: Sometimes, clearing the cache of the Teams application can resolve display issues. You can do this by signing out of Teams, closing the application, and then deleting the cache files.
4. Reinstall Teams: If the problem persists, consider uninstalling and then reinstalling the Teams application to ensure a fresh installation.
5. Check Settings: Review your calendar settings in both Teams and Outlook to ensure that everything is configured correctly.

If these steps do not resolve the issue, you may need to escalate the problem to Microsoft Support for further assistance.

References:

• Resolve interaction issues between Teams and Exchange Server

Dear @Jeffrey Lim Eng Kiat,

Thank you for posting your question in the Microsoft Q&A forum.Based on your description, the Teams shared calendar sometimes disappears but reappears after restarting your computer.

Here are some suggestions you can try:

Sign Out and Relaunch Teams

Click your profile picture in Teams > Sign out. Quit Teams completely and relaunch it.

Clear Teams Cache

• Close Teams. Press Win + R, type:

    %LOCALAPPDATA%\Packages\MSTeams_8wekyb3d8bbwe\LocalCache\Microsoft\MSTeams
  

• Delete all contents in that folder.
• Restart Teams.

For more detail information, you can refer to this article: Clear the Teams client cache

Remove and Re-add Channel Calendar Tab

• Go to the affected channel in Teams.
• Remove the existing Channel Calendar tab.
• Add it again: + Add tab > Channel Calendar.

Re-add Shared Calendar in Outlook

• Remove the shared calendar from Outlook.
• Add it again via Add Calendar > From Address Book.

If you have tried all the methods above but the issue still persists. Try to uninstall then reinstall the Teams app to check whether the issue still persists or not. The root cause is usually cache corruption or sync issues

I hope information above helpful, if you have any other questions, please feel free to reach out.

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