MS Teams Meeting Add-in for MS office

Follow these steps in order, testing Outlook after each major step:

1. Re-enable the Teams add-in correctly
   1. In Outlook, select File > Options > Add-ins.
   2. At the bottom, under Manage, select COM Add-ins and then Go….
   3. Make sure Microsoft Teams Meeting Add-in for Microsoft Office is checked.
   4. Select OK, then fully close Outlook and start it again.
2. Check if Outlook is disabling the add-in
   1. In Outlook Desktop, select File > Manage COM Add-ins.
   2. Expand Options for Microsoft Teams Meeting Add-in for Microsoft Office.
   3. 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, and restart Outlook.
3. Re-enable from Disabled Items (if Outlook crashes and disables it)
   1. In Outlook, select File > Options > Add-ins.
   2. Next to Manage, choose Disabled items, then Go.
   3. If Teams or Microsoft Teams Meeting Add-in for Microsoft Office appears, select it and choose Enable.
   4. Restart Outlook and confirm whether the Teams meeting button appears and Outlook stays open.
4. Make sure Teams and Outlook are running in the same context
   1. Close Outlook and Teams.
   2. Right‑click the Outlook shortcut → Properties > Compatibility and ensure Run this program as an administrator is unchecked.
   3. Do the same for the Teams shortcut.
   4. Start Teams first, sign in, then start Outlook.
5. Repair the Teams add-in by reinstalling Teams
   1. Close Outlook and Teams.
   2. Uninstall Microsoft Teams from Settings > Apps.
   3. Install the latest Teams client again (this re‑registers the add-in).
   4. Restart Windows.
   5. Start Teams, sign in, then start Outlook and check the add-in status under File > Options > Add-ins.
6. Prevent Outlook from disabling the add-in (advanced) If the add-in keeps getting disabled after Outlook closes:
   1. Open Registry Editor.
   2. Go to: Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Resiliency\DoNotDisableAddinList
   3. Create a new DWORD (32-bit) Value:
      • Name: TeamsAddin.FastConnect
      • Value: 1
   4. Close Registry Editor and restart Outlook.
7. Verify system and Outlook/Teams requirements
   1. Ensure .NET 4.8 and WebView2 are installed, as they are required for the Teams Meeting add-in.
   2. Confirm that Outlook is a Click‑to‑Run installation (not the Microsoft Store version) if using classic Outlook for Windows.

If Outlook still closes automatically only when the Teams add-in is enabled after these steps, involve an IT admin to:

• Check for conflicting Outlook add-ins by temporarily disabling others.
• Review event logs and, if needed, open a support case using the admin/troubleshooting guidance in the referenced docs.

References:

• Can't create a Teams Meeting in Outlook because the Teams Meeting add-in has become disabled
• Troubleshoot the Teams Meeting add-in in Outlook for Windows
• Admin - Authentication requirements and functionality of the Teams Meeting add-in in Outlook
• Resolve issues that affect the Teams Meeting add-in for classic Outlook
• Understanding the Microsoft Teams Meeting Add-in for Outlook: Eligibility, Issues, and Troubleshooting