Ok, so I am at a loss here. We are running a Microsoft Windows SBS 2003 Server with ISA. I did not configure this server, and whoever did set it up with a self signed SSL certificate for the Default Web Site and it's virtual directories (including Exchange OWA). It had been working fine but we decided it was time to get a 3rd party SSL so we purchased one and installed it. Once installed and applied to the website, and then on the incoming web requests in ISA, access was cut off to both the default web site and OWA, both internally and externally. As a temp fix, I went back and reapplied the old self signed certificate in the exact same fashion as it was before the install of the 3rd party certificate (including again on the incoming web requests in ISA) , but still no luck. Receive the following message still both internally and externally:
500 Internal Server Error - The received certificate has expired. (-2146893016)
Internet Security and Acceleration Server
But I have checked time and time again and the certificate is not expired. What's perplexing is that I have reconfigured the entire setup in the exact same way it was configured prior to the attempted 3rd party certificate install and now it's not working. So, as of right now, neither OWA nor the default web site is accessible. As you can imagine, this is not good for business.
Any help would be greatly appreciated. Thanks in advance!