Forum Discussion

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

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

Copper Contributor

Mar 29, 2018

subject

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

NunoAriasSilva
MVP
Mar 29, 2018
Hi Stavros,

Can you test the Autodiscover test to see the problem ?

http://aka.ms/rca
- Stavros Mavrommatis
  Copper Contributor
  Mar 29, 2018
  Hi Nuno,
  
  The messages are :
  
  The Microsoft Connectivity Analyzer is attempting to build certificate chains for certificate CN=mydomain.com, OU=PositiveSSL, OU=Hosted by Hostgator.com LLC, OU=Domain Control Validated.
  
  A certificate chain couldn't be constructed for the certificate.
  
  and second
  Testing TCP port 443 on host autodiscover.mydomain.com to ensure it's listening and open.
  
  The specified port is either blocked, not listening, or not producing the expected response.
  
  Thank you for your help
  - NunoAriasSilva
    MVP
    Mar 29, 2018
    Hi Stavros,
    
    That's the cause, and keep post here how the cause is based on what you found on test autodiscover.