Windows Server release information

Microsoft has updated its servicing model. The Semi-Annual Channel is a twice-per-year feature update release with 18-month servicing timelines for each release. This page is designed to help you determine the end of support date for the Semi-Annual Channel releases.

The Semi-Annual Channel provides opportunity for customers who are innovating quickly to take advantage of new operating system capabilities at a faster pace, both in applications - particularly those built on containers and microservices - and in the software-defined hybrid datacenter. For more information see the Windows Server Semi-Annual Channel overview. Customers also have the option to continue using the Long-Term Servicing Channel releases, which continue to be released every 2-3 years. Each Long-Term Servicing Channel release is supported for 5 years of mainstream support and 5 years of extended support.

Windows Server current versions by servicing option

Windows Server release Version OS Build Availability Mainstream support end date Extended support end date
Windows Server, version 1803 (Semi-Annual Channel) (Datacenter, Standard) 1803 17134.1.180410-1804 04/30/2018 11/12/2019 Review note
Windows Server, version 1709 (Semi-Annual Channel) 1709 16299.15 10/17/2017 04/09/2019 N/A
Windows Server 2016 (Long-Term Servicing Channel) 1607 14393.0 10/12/2016 01/11/2022 01/11/2027


Windows Server, version 1803, Semi-Annual Channel is governed by the Modern Lifecycle Policy. See the Windows Lifecycle FAQ and Windows Server Semi-Annual Channel overview for details regarding servicing requirements and other important information.