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Stavros Mavrommatis's avatar
Stavros Mavrommatis
Copper Contributor
Mar 29, 2018

The security certificate has expired or is not yet valid

Hi Guys,   I am trying to connect my office365 account to my Desktop Outlook 2016 application and i am getting the following message "The security certificate has expired or is not yet valid"  ...
office 365
Christopher Lee's avatar
Christopher Lee
Brass Contributor
Mar 29, 2018

This looks like it could be a result of being in hybrid where the certificate being presented by your on-premises server(s) for autodiscover may not be valid.

Stavros Mavrommatis's avatar
Stavros Mavrommatis
Copper Contributor
Mar 29, 2018

Thank you Christopher for your answer.

The only connectivity that office 365 has is with my hosting.

I checked again my DNS functions and i believe that are correct.

The autodiscover should be autodiscover.outlook.com if i am right.

Am i missing something here? :)

 

Thank you again

  • Christopher Lee's avatar
    Christopher Lee
    Brass Contributor
    Mar 29, 2018

    When you click the View Certificate button in the warning, what is the subject name that is displayed?

    • Stavros Mavrommatis's avatar
      Stavros Mavrommatis
      Copper Contributor
      Mar 29, 2018

      subject

      CN = mydomainname.com
      OU = PositiveSSL
      OU = Hosted by Hostgator.com LLC
      OU = Domain Control Validated

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