If you are validating upgrades from Windows Server 2019 or 2022, we do not recommend that you use this build as intermittent upgrade failures have been identified for this build.

Windows 11 gets resizable taskbar icons, ... Windows Server 2019 Datacenter: ... To download Windows Server 2019 build 17639, you can find it here.

Speaking of Windows Server 2019, here's a handy chart from the "Microsoft 365 Powered Devices Australia" blog that compares the features available in Windows server 2019 Standard vs. Windows ...