Fix RSAT error 0x800f0954

August 9, 2021

Open Local Group Policy Editor (gpedit.msc)
Change entry at Computer Configuration > Administrative Templates > System > Specify settings for optional component installation and component repair to “Enabled” and check the box for “Download repair content and optional features directly from Windows Update instead of Windows Server Update Services (WSUS)”

Run gpupdate in Command Prompt.
Open Settings > Apps > Apps & features > Optional features and click “Add a feature”. Search for and install “RSAT: Active Directory Domain Services and Lightweight Directory Services Tools”

Alternatively, you can add it through Powershell:

Add-WindowsCapability -Online -Name Rsat.ActiveDirectory.DS-LDS.Tools~~~~0.0.1.0

Verify the installation was complete by running Import-Module activedirectory in Powershell.