Add an existing user to Local Administrators group via Powershell
Add an existing local user to the Administrators group.
Command
# Replace with your local user ID or AzureAD/Entra ID - prefix with 'AzureAD\' for latter case $User = "username" Add-LocalGroupMember -Group "Administrators" -Member $User # Alternative script for AzureAD/Entra net localgroup administrators AzureAD\<username> /add