Let’s Encrypt is a new, automatic, free, and open certificate authority (CA) that offers to deliver free SSL certificates for everybody.
It is not just cost-free, but it is also very easy to install and doesn’t require long procedures like conventional SSL certificates.
AD FS requires a certificate for SSL server authentication on each federation server in your federation server farm.
How do I set the Own Cert to by from my CA rather than a self-signed Cert?Couple of steps we followed based exactly on the configuration outlined in our above linked blog post. We like to use a year in the name to help distinguish from the old one. Select the new certificate that you just imported and click on OK 3. You must have both the certificate and its private key available.For example, if you have the certificate and its private key in a file, you will be able import the file directly into the Active Directory Federation Services Configuration Wizard.