Microsoft Windows Server 2012 - External Connector License - unlimited external users

Windows Server powers many of the worlds' largest datacenters, enables small businesses around the world, and delivers value to organizations of all sizes in between. Windows Server 2012 redefines the server category, delivering hundreds of new features and enhancements spanning virtualization, networking, storage, user experience, cloud computing, automation, and more. Simply put, Windows Server 2012 helps you transform your IT operations to reduce costs and deliver a whole new level of business value.