If you are logged into a Windows Server OS that is not a Domain Controller, use Server Manager to add the feature.

This usually happens if the workstation cannot contact Windows Update servers to download the feature files.

On Windows 10/11, you can install only the ADUC snap-in without other RSAT tools (like DHCP or Group Policy) by using the optional features UI and selecting only the "AD DS Tools" sub-feature.

This guide covers how to install ADUC on modern versions of Windows using . 1. How to Install ADUC on Windows 10 & 11

Best for: Administrators managing AD from their personal workstation.