https://www.sslshopper.com/move-or-copy-an-ssl-certificate-from-an-apache-server-to-a-windows-server.html.
openssl pkcs12 -export -out ptiexpress.com-2014.pfx -inkey ptiexpress.com-2014.key -in ptiexpress.com-2014.crt -certfile ptiexpress.com-2014.ca-bundle