I have a server installed windows server 2008 64bit R2. It was installed by my colleague and I didn't know which key he used and he also can't recall which key was used. We need to find which key is in used. I run some free tool which can detect windows product key and it works for all OS but when I run in my server 2008 64bit. It can't detect product key. Could you advise which application or tool that can detect WINDOWS SERVER 2008 64 BIT R2 ?