I am following the guide here https://www.baswijdenes.com/portfolio/how-to-use-lets-encrypt-certificates-for-windows-servers/ to be able create a certificate to use with ADFS.
I am not able to export that certificate from IIS. It doesnt give me that option.

If I go to the certificate console in the web hosting section I can export it but it wont let me export the private key.
What am I doing wrong?
My domain is: adfs.oneidacsd.org
The operating system my web server runs on is (include version): server 2016
