Windows Server 2016
Windows Server 2016 was officially released at Microsoft's Ignite Conference on September 26, 2016. Unlike its predecessor, Windows Server 2016 is licensed by the number of CPU cores rather than number of CPU sockets—a change that has similarly been adopted by BizTalk Server 2013 and SQL Server 2014.  The new licensing structure that has been adopted by Windows Server 2016 has also moved away from the Windows Server 2012/2012R2 CPU socket licensing model in that now the amount of cores covered under one license is limited.  Windows Server 2016 Standard and Datacenter core licensing now covers a minimum of 8 core licenses for each physical processor and a minimum of 16 core licenses for each server.  Core licenses are sold in packs of two with Standard Edition providing the familiar rights to run 2 virtualized OS environments.  If the server goes over 16 core licenses for a 2 processor server additional licenses will now be required with Windows Server 2016.