Certificate Not Yet Valid or Has Expired

I recently started getting the error The security certificate presented by this website has been expired or is not yet valid when I attempted to access my Microsoft Dynamics CRM website. I was able to ignore the error in Internet Explorer, but my CRM client for Office Outlook would not connect. Outlook does not have the ability to alert the user to ignore such an error. However, the web certificate was very much in its valid range (Feb 2014 to Feb 2016)

I searched on the web but most of the posts recommended checking the Date/Time. No joy there. I finally discovered that the problem was the Certificate Authority certificate had recently expired! I was using a self-signed certificate from my SBS 2008 server. This has worked flawlessly for years, until in expired. Tried to renew the certificate, which I believe I did successfully, but was unable to update the clients with the new CA certificate in the Trusted folder.

I finally gave up and bought a new commercial certificate (I’m cheap and hate doing that for my personal stuff). Fortunately that worked a charm. I am now up and running and all the stuff I had been doing in the Outlook client is now synced back to my CRM server.