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Microsoft Teams Add-in Missing from Outlook

Anonymous
2024-08-05T08:36:02+00:00

Hello,

I'm experiencing an issue where the Microsoft Teams add-in is missing from Outlook. Despite several troubleshooting attempts, the problem persists. Here's a summary of the steps I've taken so far:

  1. Used the Teams Add-in Missing in Outlook diagnostic tool: The tool indicated that Teams isn’t installed, but I confirmed that it is installed.
  2. Used Microsoft Support and Recovery Assistant: This tool did not resolve the issue.
  3. Signed out and back in to Microsoft Teams: No change in the issue.
  4. Uninstalled New Microsoft Teams and performed an Office 365 Online repair:
  5. System Reboot and Reinstalled New Microsoft Teams: Reinstalling Teams did not fix the problem. The add-in still did not appear.
  6. Installed classic Teams using winget install Microsoft.Teams.Classic: This did not resolve the issue either.
  7. Executed manual registration of the add-in DLL:
    • Closed Outlook.
    • Opened Command Prompt as Administrator.
    • Navigated to C:\Users\*****\AppData\Local\Microsoft\TeamsMeetingAddin\1.0.24151.2\x86.
    • Executed regsvr32 Microsoft.Teams.AddinLoader.dll.
    • Restarted the machine.

Despite these efforts, the Teams add-in still does not appear in Outlook. Has anyone experienced this issue or have any additional suggestions for resolving it?

Thank you for your assistance!

Edit: If I'm trying to uninstall Microsoft Teams Meeting Add-in for Microsoft Office from Installed apps or Control Panel, I'm receiving the following error message:
"The installation source for this product is not available. Verify that the source exists and that you can access it."

"The source is 'C:\Program Files\WindowsApps\MSTeams_2410.22....' and when I try to open 'C:\Program Files\WindowsApps', it prompts me for privileged access. Although I have integrated this access into our internal remote tool, it is still denying me access."

Edit 2: I've checked for deactivated Addins, Recreated Outlook Profile, add Loadbehavior DWORD and set it to 3 as well. Didn't help.

Outlook | Windows | Classic Outlook for Windows | For home

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  1. Anonymous
    2024-08-09T12:58:13+00:00

    Solution: Resolving Missing Microsoft Teams Add-in in Outlook

    1. Uninstalling and Cleaning Up Old Teams Versions:

    • Uninstall the New Microsoft Teams:
      • Settings > Apps > Installed Apps, locate the New Microsoft Teams, and uninstall it.
    • Clean Up Old Teams Installation:
      • Follow the Clean Up and Redeployment procedure outlined in the Microsoft Teams MSI Deployment article. This ensures that any residual files or settings from previous installations are removed.

    2. Installing Classic Teams:

    • Download the Classic Teams Version:
    • Install Classic Teams:
      • Run the installer for Classic Teams.

    3. Register and Update:

    • Open Classic Teams and Configure Settings:
      • Launch Classic Teams and navigate to settings. Ensure the option "Register the new Teams as the chat app for Microsoft 365" is checked.
    • Search for Updates:
      • Use the search for updates option within Classic Teams. This triggers the installation of the New Teams.

    4. Uninstall Classic Teams and Verify Add-in Functionality:

    • Uninstall Classic Teams:
      • After the update process completes and the New Teams is installed, uninstall Classic Teams.
    • Verify the Add-in in Outlook:
      • Check if the Microsoft Teams add-in is now appearing and functioning correctly in Outlook.

    These are the steps I tried today and I could confirm the functionality with my end-user. It looks like there was a software conflict generated between old teams and new teams. I hope this helps.

    Please feel free to close this thread.
    Nazmun Nur MSFT - thank you very much for your assistance!

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  2. Anonymous
    2024-09-26T08:12:53+00:00

    Hello, 

     I experience the same issue like you George Trandafirescu. I've follow the instructions from the solution provided but at the end when I open Outlook and check Add-Ins Microsoft Teams Meeting Add-in for Office is stuck in a previews version of a New Teams in Inactiv state. 

 In Add Remove Programs I've checked and it doesn't appear and for this reason it can be visible the folder TeamsMeetingAdd-in from %LocalAppData%\Microsoft.

    Can you give us support ?

    Thank you in advance !

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  3. Anonymous
    2024-08-05T11:21:03+00:00

    Hello George Trandafirescu**,**

    Good day! Thank you for reaching out to Microsoft community.

    The issue you're encountering with the Microsoft Teams add-in missing from Outlook, despite multiple troubleshooting attempts, may stem from several factors based on the steps you've already undertaken.

    When you said, "Loadbehavior DWORD and set it to 3". Did you mean the HKEY_CURRENT_USER\Software\Microsoft\Office\Outlook\Addins\TeamsAddin.FastConnect and set to 3?

    To better understand your problem, I need you to give me some additional information so that we can get on the same page and resolve the issue by working together. Please correct me if I am wrong and I need your help on sending all the answers along with the data only via Private Messages - Microsoft Community.

    • May I know your affected account type and subscription? Is it Microsoft365 business or Microsoft Personal account (outlook.com/Hotmail.com/live.com) or any third-party account?
    • Could you please provide us product and version details of your Outlook? About Office: What version of Office am I using? - Microsoft Support and What version of Outlook do I have? - Microsoft Support.
    • Are you a on-premises mail user?
    • Do you have hybrid configuration or environment? or running as fully cloud environment?
    • Was it working normally before?
    • Are you a global administrator user or an End user?
    • Do you have access to Microsoft 365 Admin Center?
    • Are you connected through a proxy, firewall, VPN or antivirus? If you do, please turn them off or bypass them and try to log in again.

    I understand you have already tried to resolve the issue with the Support and Recovery Assistant. However, I want you to collect the data from it and share it with me please. as you know,

    Microsoft Support and Recovery Assistant use advanced diagnostics to report known problems and details about your Microsoft Outlook configuration.

    Note: to access private message platform, please click on this link: Private Messages - Microsoft Community.

    Please understand that our initial response may not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.

    Thanks for choosing the MS community.

    Looking forward to your response and have a great day ahead!!

    Sincerely

    S M Nazmun Nur | Microsoft Community Moderator

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