Windows Server 2019 Servicing by Install Modes

Windows Server currently supports two servicing models, with a total of three installation modes. These servicing models, called channels, determine how often new features are delivered and how long each version is supported. Each channel, and the installation modes they service, focuses on certain use scenarios.

The Long-Term Servicing Channel (LTSC) provides Windows Server with Desktop Experience and the Server Core installation modes. The LTSC receives security updates and critical bug fixes monthly or more frequently. Systems on an LTSC version are eligible for five years of Mainstream support and five years of Extended support. New features are delivered with subsequent LTSC versions, roughly every two to three years. Organizations require new licenses or must maintain Software Assurance to obtain new LTSC versions. The LTSC allows businesses that have licensed Windows Server to defer new features until their deployed LTSC versions leave Extended support, which can benefit systems where stability and application compatibility are critical. LTSC versions of Windows Server (including Windows Server 2019) are recommended for general purpose file servers, first- and third-party workloads, traditional server applications, and infrastructure and data center roles.