I have here a unused Plesk licence for fedora. This licence was ordered for a customer who ordered a webserver with plesk licence but he did not pay, so the server is never delivered to the customer and the licence is not is use. Now we need a Windows2003 server with PLESK installed. I am wondering if I can use this key for this Windows server? If not we have to order a new key in spite of that we have a unused key available. Does someone has idea of this key can be used?