When attempting to bind an SSL certificate to a website, you get the error : "A specified logon session does not exist. It may already have been terminated. (Exception from HRESULT: 0x80070520)"
The most likely cause of this error is a private key not being installed for the SSL certificate.
This means that the "Mark Exportable" check box was not selected when importing the SSL certificate. To resolve this issue, re-import the SSL certificate from MMC certificate console and make sure the "Mark Exportable" check box is selected.
