Certificate Error in Autodiscover

Hello my fellow techy peps, I need help with Office 365. Namely, I am getting lately certificate error in Autodiscover. I installed it with proper certificates but problem persists. What might be the issue here as it seems my computer is refusing the certificate even though it is updated to newest standards?

  1. Try clearing the DNS cache. type ipconfig /flushdns on the command prompt
  2. Try updating the DNS servers to google or OpenDNS public DNS servers.

Please check the link below