title: How to cross signing using Microsoft signtool
body: <p>I would appreciate if someone could teach how to sign a file using Microsoft signtool as below,</p>
  <p>To have one certificate signed by the first authority; and one certificate signed by the second authority - both are having the same public key / fingerprint and subject line, then to sign a file to have one signature with these 2 certificates,</p>
  <p>Your prompt reply is appreciated,</p>
  <p>Many thanks in advance.</p>