It is used for the global evaluation of Microsoft’s new Server OS. It is an isolated evaluation environment, not connected to any other evaluation products or even to the Internet. It only provides a limited evaluation capability for testing but no products. I’ll download the images and install them in the next day.
When you install, on the first screen, you will be greeted with the message "Welcome to the licensed evaluation environment for Windows Server 2016". Follow the on-screen instructions to proceed with the inquiry, and it will then display a license for Windows server with 160-day validity. This license allows you to try to the software for free and has no cost.
Also, before you use the evaluation product key, download the Windows Server 2016 installation ISO. You will then be able to install the copy of Windows Server 2016, in the evaluation mode, using that key.
Do not think that if you download the eval version with eval license, it means that you have a legitimate product key that works for Windows Server 2016. Because after you install Windows Server 2016, you will also need a valid Windows Server 2016 Pro, Datacenter or Enterprise product key to get the full Windows Server 2016 version.
This link give you the opportunity to redeem for key, a serial key that can be used to activate Windows on up to five computers. We will refer to this product as the "evaluation serial number" (or "product key") d2c66b5586