Client of mine called this morning saying they had to restart the server, I connected after to see it give me the error about improper shutdown, not sure if they held the power button or not.
Now I try to browse the https://domain/exchange
and getting a HTTP 500 error, was getting a HTTP 1.1/ 503 Service is no longer available.
Read some articles, and reset the HKEY Classes Root Permission. Still having same issue.