I am out of my depth here with all these certs.
Current scenario: Exchange 2007+ ISA server (OWA/Autodiscover, etc)
UCC Cert expires on 10/15/2014, it's a SHA-1
Initially, I tried to just renew the cert with the same CSR (not knowing about the SHA1) and got it installed on Exchange and everything was working, but I couldn't export the private key pair for ISA, so I ended up rolling back to the expiring cert.
Spoke with GoDaddy and was advised to not re-use the CSR and create a new one, which I did. Unfortunately, there is a bug in their GUI so my new cert was missing the 4 SAN after I installed on Exchange.
Spoke with GoDaddy again, they said, yeah, go ahead and re-key it. I did and this time the cert installed but wouldn't show up. I tried reinstalling and get an error message that the cert couldn't be used with Exchange because there was...