I had been battling HTTPS SSL Certificate errors when users tried using Outlook Web Access or Remote Desktop Connection.
I got a hold of the certificate provider and they said my server had been set up wrong. It was set up as "remote.domainname.com, when it should have been set up as mail.DomainName.com.
They change something on the server (remotely) and now I am able to use OWA and Remote Desktop without security certificate errors. But now when ever anoyone open MS Outlook, they get a Security Alert pop-up - .The name on the security certificate is invalid or does not match the name of the site." On the pop-up it references remote. DomainName.com, but when I view the certificate from the button on the pop-up, it says that the certificate is issued to mail.domaionname.com