Active Directory Federation Services – Certificate Error ‘CNG Key’
KB ID 0001129 Problem When installing the Active Directory Federation Services Role, you need to supply a certificate. I was running this up using a self signed wildcard certificate when this happened; The certificate with the specified thumbprint {thumbprint} has a Cryptographic Next Generation (CNG) private key. The certificates with the CNG private key are not supported. Use a certificate based on a key pair generated by a legacy...