To manage users and computers in your Active Directory from PowerShell, you need the ActiveDirectory module which comes as part of the free RSAT tools from Microsoft.
Using Implicit Remoting for ActiveDirectory Module
Provided you are domain administrator and have remoting access to your domain controller, you can also export the ActiveDirectory module from your DC, and use it locally via implicit remoting.
Here is how you do this:
$DC = 'dc1' # rename, must be name of one of your domain controllers # create a session $s = New-PSSession -ComputerName dc1 # export the ActiveDirectory module from the server to a local module "ADStuff" Export-PSSession -Session $s -OutputModule ADStuff -Module ActiveDirectory -AllowClobber -Force # remove session Remove-PSSession $s