The target principal name is incorrect – Microsoft Outlook

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8 Responses

  1. Shahrokh Khanizadeh says:

    excellent details on how to fix the certificate error in outlook 2019
    thank you

  2. Scully says:

    This doesn’t work for my issue. Once I implement the change, Outlook will no longer open.

  3. Lubo says:

    Nice! Thank you.

  4. Raul says:

    Solved the issue, thank you!

  5. Glen Bierworth says:

    I’m not finding the Issued to value.

  6. Rob Kraft says:

    Sweet, worked great. I always assumed my incoming and outgoing servers would need a full uri like mail.mydomain.com; but I changed both to match my cert (mydomain.com) and it worked.

    • Leisa Zoeller says:

      It was actually your comment here that fixed it for me not the article. Changing the url to mydomain.com totally worked. I still have mismatched certificates (mydoman.com vs the cert in webhost.com) but it works. Thank you.

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