Original Windows Server 2012 R2 Enterprise DC OEM License 64 Bit DVD Media

Original Windows Server 2012 R2 DC OEM License 64 Bit DVD Media 

How to find your Microsoft product key

To find your 25-character key, you need to remove the silver scratch-off panel on the Certificate of Authenticity which is supplied with your product. This is easily done with a coin or fingernail. Don't press too hard or you could damage the key making it unreadable.

Remember, to avoid damaging your product key:

Don't use any other tool apart from a coin. You can also use your fingernail
Don't apply too much pressure
Don't try to peel the scratch layer off

Windows Server 2012 R2 Standard is a flexible, powerful, and easy-to-use server solution. Whether your company is a small business or a large enterprise, Windows Server R2 2012 Standard can help you cloud optimize your business.
Windows Server 2012 R2 Standard enables you to blend your on-premises solutions with the cloud without having to re-engineer infrastructure, systems management, or applications. It offers customers scalable, dynamic, and multitenant-aware cloud infrastructure that helps users connect across-premises. As a result, IT can respond to business needs with greater agility and efficiency, and the mobile workforce is able to access personalized work environments from virtually anywhere.

Hyper-V 2.0 - included in the operating system and provides 16x improvement in the amount of vCPU and RAM assignable to virtual machines
Live Migration – move virtual machines between physical servers with no downtime or loss of data
Hyper-V Replica – replicate virtual machines to another server in another location every 30 seconds

With Windows Server 2012 R2, it's even easier to deploy and deliver virtual resources across devices. VDI technologies offer easy access to a rich, full-fidelity Windows environment running in the datacenter, from virtually any device. Through Hyper-V and Remote Desktop Services, Microsoft offers three flexible VDI deployment options in a single solution: Pooled Desktops, Personal Desktops, and Remote Desktop Sessions.

Each physical server requires at least one license
Each license covers two CPUs, thus a four CPU server would require two license (one base license and one additional license)
Each license assigned to a physical server grants the use of two Windows Server virtual machines on that physical server
Additionally, a Windows Server 2012 Client Access License (CAL) is required for each user or device that accesses the server