Resolve issues with Teams Meeting add-in for Outlook

If you’re a Microsoft Teams administrator and your users aren’t able to install the Teams Meeting add-in for Outlook, schedule Outlook meetings from Teams, or schedule Teams meetings from Outlook, try the following steps to troubleshoot and resolve the issue.

Check policies

Verify that the following policies are assigned to the affected users:

Use Microsoft Support and Recovery Assistant

If the policies are assigned correctly, but you’re still unable to install the add-in, or if you’re not an administrator, download and run Microsoft Support and Recovery Assistant by selecting the button below. The Assistant is the recommended solution to perform automated troubleshooting steps and make the required fixes.

The Enterprise (command-line) version of the Assistant

If you’re an administrator who has multiple users affected by the issues with the Teams Meeting add-in, you can use the Enterprise (command-line) version of the Assistant. The Enterprise version of the Assistant is a command-line version that can be scripted to detect and fix most of the issues automatically without requiring user interaction. For details about using the command-line version of the Assistant to troubleshoot issues with the Teams Meeting add-in, see Enterprise version of Microsoft Support and Recovery Assistant.

Fix the issue manually

If you’d like to perform the checks and make the fixes manually, do the following:

  • If the users are running Windows 7, install the Update for Universal C Runtime in Windows. This update is required for the Teams Meeting add-in to work.

  • Verify that the users have the Teams desktop client installed. The meeting add-in can’t be installed when using only the Teams web client.

  • Verify that the users are running Outlook 2013 or later.

  • Verify that all available updates for the Outlook desktop client have been applied.

  • Exit Outlook.

  • Exit Teams.

  • Run one of the following commands that’s appropriate for your Office installation to re-register Microsoft.Teams.AddinLoader.dll:

    • 64 Bit Office: %SystemRoot%\System32\regsvr32.exe /n /i:user %LocalAppData%\Microsoft\TeamsMeetingAddin\1.0.18012.2\x64\Microsoft.Teams.AddinLoader.dll

    • 32 Bit Office: %SystemRoot%\SysWOW64\regsvr32.exe /n /i:user %LocalAppData%\Microsoft\TeamsMeetingAddin\1.0.18012.2\x86\Microsoft.Teams.AddinLoader.dll

    Note There might be multiple folders with the same version number under \TeamsMeetingAddin. Select the folder with the highest build number.

  • Restart the Teams desktop client.

  • Sign out and then sign into the Teams desktop client.

  • Restart the Outlook desktop client and make sure that Outlook isn't running in admin mode.

Check the status of the add-in in Outlook

If you still don't see the Teams Meeting add-in, make sure it's enabled in Outlook.

  • In Outlook, select File > Options.

  • In the Outlook Options dialog box, select the Add-ins tab.

  • Check whether Microsoft Teams Meeting Add-in for Microsoft Office is listed in the Active Application Add-ins list.

  • If the add-in is not listed in the list of active applications, and you see the Teams Meeting Add-in listed in the Disabled Application Add-ins list, select Manage > COM Add-ins and then select Go…

  • Select the checkbox next to Microsoft Teams Meeting Add-in for Microsoft Office.

  • Select OK on all the dialog boxes that are open and restart Outlook.

Verify registry settings

If the add-in still doesn’t display, use the following steps to check the registry settings.


Follow this section's steps carefully. Incorrect registry entries can cause serious system issues. As a precaution, back up the registry for restoration.

  • Launch RegEdit.exe.

  • Navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins.

  • Check whether TeamsAddin.FastConnect is displayed.

  • Under TeamsAddin.FastConnect, make sure LoadBehavior is displayed and is set to 3.

  • If LoadBehavior has a value other than 3, change it to 3 and restart Outlook.