Microsoft Windows Server Datacenter 2012 – Additional License (No media, License only) – OEM

Run an unlimited number of Virtual Machines; this license adds support for two additional CPUs

Windows Server 2012 Datacenter – for a highly virtualized environment that requires high availability features, including clustering.

• Data Deduplication – finding and removing duplication within data without compromising its fidelity or integrity.
• Hyper-V Replica – affordable disaster recovery, included in Windows Server 2012, makes an initial replica of virtual machines and then replicates any changes.
• Complete server virtualization platform that delivers a fully isolated, multitenant environment.
• Flexible storage options allow you to control the cost of your growing storage needs. Improve server performance, availability, and storage resource efficiency with the storage hardware of your choice.
• Access from virtually anywhere, from any device. Seamless, on-demand access to a virtualized work environment from virtually anywhere, including branch locations.
• Increased scalability and performance through a high-density, scalable environment that can adapt to perform optimally based on your changing needs.
• Windows Server Failover Clustering
• Every user or device accessing the server OS requires a CAL (Client Access License)