Neri, That should be the downgrade ISO that you would use to re-install the OS down to the lower version that you need. The server would come pre-installed with a higher version.  I would have to see the entire order to get better picture.  Let us know if you to private message us the order number and we'll be glad to take a look for you. 
Hello everybody, Somebody know, What is the function of this component of OS? "Windows Server 2012R2 Standard, Media, FI Standard Ed Downgrade image, Eng (634-BBOZ)" Thanks and Regards!
Review OS PowerEdge Server