To find WWN numbers on Physical Servers with Windows Server operating system, one of the options is to install a utility provided by Microsoft called "Fibre Channel Information Tool" (fcinfo)
This can be downloaded from Fibre Channel Utility
Download and install the utility and execute the same from command prompt.
Change the path to c:\windows\SysWOW64 and run fcinfo, then it would display the following info.
Hope this is helpful.....
