If you are setting up a new environment on Windows Server 2025, you might have run into a frustrating issue: you try to adjust your Internet Explorer (IE) security zones, only to find the "Medium-High" setting is completely missing or the slider is grayed out.
This happens because Windows Server ships with Internet Explorer Enhanced Security Configuration (IE ESC) enabled by default. This feature forces the browser into a high-security lockdown mode, preventing you from selecting lower security levels like "Medium-High" or "Medium."
In this article, I’ll walk you through the four methods to resolve this issue, ranging from the standard Server Manager fix to advanced registry edits.









