• I can't help with your specific Certificate Enrollment process, but if we assume you've managed to generate a valid certificate, which includes the private key, then:

    The certificate needs to be imported to:

    Local Computer > Personal > Certificates

    Also need to check the root trust for the certificate; if this is not correct, then check with your security team. If you use MMC and open Certificates, you should be able to browse to the Personal cert.store and see the certificate (with a nice little padlock indicating the private key is attached).