Create and install a certificate using IIS or import a pfx file, the cert can be SHA256 or whatever you want.
Open your Cert Manager,
- Run/open "MMC"
- File, Add/Remove Snap-in, Certificates, OK
- Expand the folder with your cert (generally Personal, Certificates)
- Right Click the Certificate, Open
- Details tab, near the bottom choose thumbprint and select the HASH VALUE
- remove the spaces from the HASHVALUE
- open a Command Prompt with elevated privileges
- run the following command using your SSL cert's thumbprint hash value in place of "HASHVALUE" remove the quotes.
- wmic /namespace:\\root\cimv2\TerminalServices PATH Win32_TSGeneralSetting Set SSLCertificateSHA1Hash="HASHVALUE"
- It should say "Updating property(s) of ...
- then it should say .. update successful
That's it, you're done.