Licenses and Physical Hardware
Client Access Licenses (CALs) remain required for access to Windows Server 2012. Therefore, CAL requirements have not changed. As in the past, CALs must be equivalent or higher in version as compared to the Windows Server version being accessed. Therefore, Windows Server 2012 requires Windows Server 2012 CALS. Licensing requirements for Remote Desktop Services (RDS
) and Active Directory Rights Management Service (ADRMS) remain the same and still require appropriate CALs for access.
What is different is what the Windows Server license provides. A single license for either available edition provides use of up to two physical processors. If you have additional physical processors in the same server, simply assign additional licenses for Windows Server 2012 for the edition purchased as needed for the additional set of physical processors. When I say ‘assign’ another license, I might as well say allocate because this is for licensing compliance. Currently you can only register one license key per server. Just make certain you have enough licenses purchased to cover the number of physical processors and for any virtualization needs
(discussed in the next section). Remember, each license provides for up to two additional physical processors. The number of cores available per processor is irrelevant. If you have an odd number of physical processors, you can’t purchase server licenses for individual physical processors; they cover up to two. For purposes of example, if you assign four Windows Server 2012 Standard edition licenses to the same server, that server is licensed for use of eight physical processors and as many cores per physical processor as the OS will support.