I have a problem with your Plesk application. I am currently trying to migrate my companies Web server to another server (with plesk). I have successfully exported the private key from the original server successfully. The file that was exported had an file extension like filename.pfx. When trying to Import this into Plesk I have absolutely no luck. It gives me error message Unable to set private key the private key format is invalid The following is what im doing: * Click server Click Certificates Click Add * Enter Certificate name (Fill in form) * Attach private key file via the browse button * Attach the certificate via the browse button I would be very grateful if you could give me some assistance.