After long ours of reading Microsoft documents I installed the certificate
as of the steps provided by Microsoft then I tried the steps to turn on SSL including
enabling port 443 for the default website.
Then tried https://domain.com/exchange and got :
"The certificate is not approved for the attempted operation"
Microsoft documents recommend buying an SSL certificate and gives another option
to use my own by installing the certificate server. I went for the second option.
Does anyone have any clues ?