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krishna2320's avatar
krishna2320
Brass Contributor
May 01, 2020

Internal Teams user showing as External

We are experiencing strange behavior in Teams, sometimes few internal users are showing as external user. This is mostly happening in Teams Mobile app.   Any idea pls?
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Jaisson's avatar
Jaisson
Copper Contributor
Sep 15, 2020

krishna2320 

 

I experienced the same thing.  Follow this process to fix it:

 

  • Exit the Microsoft Teams desktop client
  • Right click on the Teams icon in your system tray
  • Click Quit
  • Launch File Explorer
  • Browse to: %appdata%\Microsoft\Teams
  • Delete all files and folders in said directory
  • Restart Microsoft Teams
  • Restart the Computer (last resort but I would try just step 7, it may be sufficient) 

Jaisson

  • Nachofriend's avatar
    Nachofriend
    Copper Contributor
    Dec 01, 2020

    Jaisson  Hi i followed your process i did remove files and folder from %appdata%\Microsoft\Teams

    and it worked for the use.

    Now after a month user is contacing me with the same issue.

     

    So it work as workaround but i need a better solution.Thanks

    • Berglez's avatar
      Berglez
      Copper Contributor
      Dec 10, 2020

      So let me share my solution to this problem. I had this same error with one of my internal organization contact showing as external. Digging deep I found we had a contact created for that user pointing to his external private email (also Teams enabled).

       

      External contact email attribute was: username@CompanyNA.mail.onmicrosoft.com

       

      Checking AD attribute for that internal user showed attribute: targetAddress: username@CompanyNA.mail.onmicrosoft.com (basicly pointing to that contact address)

       

      Changing targetAddress attribute to: mailto:username@CompanyNA.onmicrosoft.com resolved our issue.

       

      Somehow our internal user get linked with that contact address.

       

      Hope that helps someone.

      • DJayce's avatar
        DJayce
        Copper Contributor
        Jun 26, 2021

        Berglez  Hello, I Had a similar issue in sharing and permissions for a shared calendar and I was pretty sure it may have something to do with your issue. Let me know if they relate!



        Anyway, the resolution ended up being the licensed user was a shared mailbox (though was still signed into the account via Outlook as a regular account).

        After switching the shared mailbox back to a user mailbox, the issue was resolved. Hopefully this happens to be your case!

         

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