Installing Active Directory on Windows Version 21H1 and Higher
Posted by O'Hanlon, Derek on 29 June 2021 08:00 AM

When trying to install RSAT: Active Directory Domain Services and Lightweight Directory Services Tools, you may find that the typical method of instillation (Start Button > Settings > Apps > Optional features > Add a feature) fails. If that is the case, simply do the following and then try the process again: 

  1. Go into RegEdit and set the HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU folder.
  2. DoubleClick on UseWUServer(UseWindowsUpdateServer) and change the value to 0.  (If the value is already 0 this fix may not work for you.)
  3. Go into services.msc and restart the Windows Update Service

After all this, the regular instillation process should now work. 

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