Microsoft provides a 180-day evaluation version of Windows Server 2019. While the Microsoft Evaluation Center typically offers the most recent refreshed ISO (often build 17763.737), you can reach build 17763.1817 by installing the base ISO and then applying the update through Windows Update. Editions available: Datacenter and Standard.
Server Core (recommended) or Desktop Experience (full GUI).
For advanced users, UUP Dump allows you to download files directly from Microsoft's update servers to compile a custom ISO for build 17763.1817. 3. Alternative Repositories KB5000822 (OS Build 17763.1817) KB5000822 (OS Build 17763.1817) - Microsoft Support. Microsoft Support