Remember: The 180-day evaluation leads to downtime. The genuine leads to stability and compliance. Download wisely.
This guide explains how to source the correct ISO, the difference between the versions, and how to convert an existing evaluation install into a full retail or volume license version. Evaluation vs. Full Version: What’s the Difference? Windows Server 2016 Standard Iso Not Evaluation
Windows Evaluation Editions | MAS - Microsoft Activation Scripts Remember: The 180-day evaluation leads to downtime
If an evaluation version is already installed, you can convert it to a full version without reinstallation using DISM: the difference between the versions