Connecting and synchronizing calendars across Microsoft Teams and other services like Outlook
For a single affected user, the most likely causes are that the Teams Meeting add-in is missing, disabled, or Outlook and Teams are not running in the same sign-in/runtime context.
- Verify the user is on a supported setup:
- Windows with Outlook Classic, Outlook 2013 or later.
- Teams desktop client installed on the same machine.
- Signed in with a work or school account that has a Teams license.
- The add-in is not supported for personal Outlook.com scenarios, POP/IMAP accounts, or Microsoft Store Office installs.
- Check whether the add-in is installed and enabled in Outlook:
- In Outlook, go to File > Options > Add-ins.
- Under Manage, select COM Add-ins > Go.
- Look for Microsoft Teams Meeting Add-in for Microsoft Office.
- If it is present but unchecked, check it and select OK.
- If Outlook disabled the add-in, re-enable it:
- In Outlook, go to File > Options > Add-ins.
- Under Manage, select Disabled Items > Go.
- If Teams appears there, select it and choose Enable.
- Restart Outlook.
- Make sure Outlook and Teams are running in the same context:
- Right-click the Outlook and Teams shortcuts.
- Open Properties > Compatibility.
- Confirm Run this program as an administrator is unchecked for both apps.
- Restart in the correct order:
- Fully quit Outlook.
- Quit Teams from the system tray.
- Start Teams first and sign in.
- Then start Outlook.
- If the user recently moved to new Teams and the add-in is missing entirely:
- Open Settings > Apps > Installed Apps.
- Find Teams Meeting Add-in and uninstall it.
- Close Outlook.
- Quit Teams from the system tray.
- Restart new Teams.
- Wait until Teams Meeting Add-in appears again in installed apps, then restart Outlook.
- If the user is on new Outlook instead of classic Outlook:
- There is no separate add-in to install.
- The meeting form should show a Teams meeting toggle.
- To reinitiate integration, close Outlook, quit Teams, start Teams and sign in, then start Outlook.
- The user must be signed in to both Outlook and Teams with the same work or school account and use the new Teams client.
If the add-in still does not appear after these steps, reinstalling the Teams desktop client is a supported next step to re-register the add-in.
- Understanding the Microsoft Teams Meeting Add-in for Outlook: Eligibility, Issues, and Troubleshooting
- Understanding the Microsoft Teams Meeting Add-in for Outlook: Eligibility, Issues, and Troubleshooting
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