Cannot create KDS Root Key - "Request is not supported"

FYI for anyone finding this question in the future. I was able to resolve it like this:

  • (1) Log on to another non-DC in the domain
  • (2) Log on as a domain admin
  • (3) Install/add the RSAT tools (the AD ones in particular)
  • (4) Launch the PowerShell AD tool
  • (5) Run the Add-KDSRootKey from the new machine.

Hope this helps someone


Try right click on the powershell icon and run as administrator and rerun the command.

Also be attentive to privileges. Creating a KDS Root Key requires Domain Administrator (in the root top-level domain) or Enterprise Administrator privileges.