Microsoft has updated its servicing model. Starting with Windows Server 2022 there is one primary release channel available, the Long-Term Servicing Channel. The Semi-Annual Channel will still be supported up to the dates shown in the table below. This page is designed to help you determine the end of support date for the Long-Term Servicing Channel and Semi-Annual Channel releases.
The Semi-Annual Channel in previous versions of Windows Server focused on containers and microservices, and that innovation will continue with Azure Stack HCI. With the Long-Term Servicing Channel, a new major version of Windows Server is released every 2-3 years. Users are entitled to 5 years of mainstream support and 5 years of extended support. This channel provides systems with a long servicing option and functional stability, and can be installed with Server Core or Server with Desktop Experience installation options. The Long-Term Servicing Channel will continue to receive security and non-security updates, but it will not receive the new features and functionality.
Windows Server current versions by servicing option
Windows Server release Version Build number Availability Mainstream support end date Extended support end date Windows Server, version 20H2 (Semi-Annual Channel) (Datacenter Core, Standard Core) 20H2 19042.508.200927-1902 10/20/2020 05/10/2022 Not applicable Windows Server, version 2004 (Semi-Annual Channel) (Datacenter Core, Standard Core) 2004 19041.264.200508-2205 05/27/2020 12/14/2021 Not applicable Windows Server, version 1909 (Semi-Annual Channel) (Datacenter Core, Standard Core) 1909 18363.418.191007-0143 11/12/2019 05/11/2021 Not applicable Windows Server 2019 (Long-Term Servicing Channel) (Datacenter, Essentials, Standard) 1809 17763.107.1010129-1455 11/13/2018 01/09/2024 01/09/2029 Windows Server 2016 (Long-Term Servicing Channel) (Datacenter, Essentials, Standard) 1607 14393.0 10/15/2016 01/11/2022 01/11/2027
Windows Server, version 1803 and later are governed by the Modern Lifecycle Policy. See the Windows Lifecycle FAQ and Comparison of servicing channels for details regarding servicing requirements and other important information.
Source: Windows Server release information