Windows Server 2016 is currently in the Extended Support phase. During this phase, Microsoft continues to provide paid support and releases security updates, but non-security hotfixes are generally not provided unless an Extended Hotfix Support Agreement is purchased. Organizations using this ISO today are advised to plan for migration to Windows Server 2022 or Azure within the next few years.
Insert your USB or mount the ISO via a hypervisor (like VMware ESXi, Hyper-V, or VirtualBox). Reboot the server and press the appropriate key (F12, F2, ESC) to enter the boot menu. Select your USB/DVD drive. microsoft windows server 2016 iso