Why has my Teams Meeting option/button gone from my meeting invites?

Hello @Steven Dow,

Thank you for reaching out about this issue.

To help narrow this down, I’d like to clarify a few points first. When you mentioned that the Teams Meeting option/button is missing, does this happen when you are creating a brand‑new calendar event, or does it also affect existing meetings? Additionally, are you experiencing this behavior when scheduling meetings from Microsoft Teams or from Outlook, and does it occur in the desktop app, the web version, or both?

For context, I have seen similar report from other user where this issue was related to a corrupted calendar configuration on the backend. In those cases, Microsoft Support identified that the user’s mailbox configuration for the default online meeting provider was not set correctly, which caused the Teams meeting toggle to disappear. In some instances, the user’s working hours configuration was also misconfigured, which contributed to the problem.

When this is confirmed to be the cause, the resolution typically requires an IT administrator to run a PowerShell command to reset the user’s default online meeting provider back to Teams:

Set-MailboxCalendarConfiguration -Identity <user email address> -DefaultOnlineMeetingProvider TeamsForBusiness

Since this change affects mailbox‑level settings, it cannot be done directly by end users.

For reference, you may find this Microsoft Q&A thread helpful: Teams Meeting toggle on new Outlook and Teams upon creating event not available - Microsoft Q&A

Once you’ve had a chance to confirm where and how the issue occurs, feel free to share the details and I can advise on the most appropriate next steps.

Kind regards,

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The Teams Meeting option can disappear from meeting invites in Outlook or Teams for several common reasons, all covered in the provided context:

1. Teams Meeting add-in is disabled or missing in Outlook
   In Outlook Desktop, the Teams Meeting button depends on the “Microsoft Teams Meeting Add-in for Microsoft Office.” If Outlook detects performance issues, it can automatically disable this add-in, which removes the Teams Meeting option from the ribbon and meeting form. To restore it:
   1. In Outlook Desktop, select File > Manage COM Add-ins.
   2. Find Microsoft Teams Meeting Add-in for Microsoft Office.
   3. Expand Options and choose Do not monitor this add-in for the next 30 days. If that is not available, choose Always enable this add-in.
   4. Select Apply, then Close.
   If it is in the Disabled Items list:
   1. In Outlook, go to File > Options > Add-ins.
   2. At the bottom next to Manage, choose Disabled items, then select Go.
   3. If Teams is listed, select it and choose Enable.
   4. Restart Outlook and check if the Teams Meeting option has returned.
   To help prevent Outlook from disabling the add-in again, an admin can add this registry key on the device:
   • Path: Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Resiliency\DoNotDisableAddinList
   • Create a new DWORD (32-bit) value:
     • Name: TeamsAddin.FastConnect
     • Value: 1
   Also ensure the system meets requirements mentioned in MC392289: .NET 4.8 and WebView2 must be installed for the Teams Meeting add-in to work correctly.
2. New Teams client did not install the add-in correctly
   After updating to the New Teams client, the Teams Meeting add-in may not be installed properly, which removes the Teams Meeting button in Outlook and the add-in from the COM Add-ins list. To fix this:
   1. Uninstall the Teams Meeting Add-in:
      • Right-click Start > Settings > Apps > Installed apps.
      • Search for Teams Meeting Add-in.
      • Select the three dots (…) and choose Uninstall.
   2. Close Outlook.
   3. Close Teams from the system tray (right-click the Teams icon > Quit).
   4. Restart New Teams. This forces New Teams to reinstall the Teams Meeting Add-in.
   5. When the Teams Meeting Add-in reappears in Installed apps, restart Outlook and confirm the Teams Meeting button is back.
3. Eligibility or configuration issues for the Teams Meeting add-in
   The Teams Meeting option can also be missing due to configuration or policy:
   • Not signed in to the Teams desktop app with a valid commercial account.
   • Tenant admin has disabled the Teams add-in for Outlook in the Teams admin center.
   • Teams or Office not installed or updated correctly.
   • Corrupted registry keys or user profile.
   • Outdated Teams or Office versions.
   • Outlook running as administrator while Teams is not, which prevents the add-in from loading.
   In these cases, an admin should verify:
   • User is licensed and signed in to Teams with the correct work account.
   • Teams add-in is allowed in the Teams admin center.
   • Office and Teams are up to date and installed correctly.
   • Outlook is not running in elevated (Run as administrator) mode when Teams is not.
4. Mailbox calendar configuration (DefaultOnlineMeetingProvider) issues
   If the Teams toggle is missing in both the new Outlook and Teams when creating events, the mailbox calendar configuration can be corrupted or misconfigured. In the referenced case, the user’s DefaultOnlineMeetingProvider was Unknown, which removed the Teams meeting toggle. An Exchange/Entra admin can fix this with PowerShell by setting the default online meeting provider to Teams:

      Set-MailboxCalendarConfiguration -Identity <user@domain> -DefaultOnlineMeetingProvider TeamsForBusiness
   

   After this change, the Teams meeting toggle reappeared in both new Outlook and Teams for that user.
5. Other reasons the add-in may be missing or disabled
   The add-in can be missing or disabled due to:
   • Outlook automatically disabling it for performance reasons.
   • Damaged user profile or registry entries.
   • Old or incompatible Teams/Office versions.
   These scenarios are addressed by the steps above: re-enabling the add-in, reinstalling via New Teams, ensuring correct versions and installation, and correcting mailbox configuration.

References:

• Can't create a Teams Meeting in Outlook because the Teams Meeting add-in has become disabled
• Teams Meeting add-in is missing in Outlook Desktop after updating to New Teams
• Understanding the Microsoft Teams Meeting Add-in for Outlook: Eligibility, Issues, and Troubleshooting
• Teams Meeting toggle on new Outlook and Teams upon creating event not available - Microsoft Q&A