Windows Server 2016 follows a long-term servicing model. While this specific build was a stepping stone, the broader 1607 version has a defined lifespan: KB4016635 (OS Build 14393.970)
As an EN-US baseline release, this build integrated essential security patches for the Windows Kernel, Internet Information Services (IIS), and remote desktop protocols (RDP), closing off vectors for privilege escalation and remote code execution. windows server 2016 build 14393970 enus april 2017 2021
The Lifecycle Trajectory: From 2017 Baseline to 2021 Relevance Windows Server 2016 follows a long-term servicing model
This article covers:
The media structure contains four primary installation options: (Desktop Experience) Windows Server 2016 Standard Core (Headless deployment) Windows Server 2016 Datacenter (Desktop Experience) Windows Server 2016 Datacenter Core (Optimized for Hyper-V) The 2021 Update Context & Lifecycle Management Internet Information Services (IIS)