Enable PowerShell on a remote PC using WMI

Enable-RDP.ps1

#
# Author: M. Stevenson
# Desc  : Enable RDP on a remote computer, given the hostname or IP
# Date  : 2014-11-04 - M. Stevenson - Initial Version
#

Function Enable-RDP {
    [CmdletBinding()]
    param(
        [parameter(Mandatory=$true,ValueFromPipeline=$true,HelpMessage="Enter the name/IP of the computer to enable RDP on")]
        [string]$computer
    )
    PROCESS {
        if (!(Test-Connection -ComputerName $computer -Count 1 -ea 0)) {
            Write-Host "$computer : OFFLINE"
            Continue
        }

        try {
            $rdp = gwmi -Class Win32_TerminalServiceSetting `
                        -Namespace root\CIMV2\TerminalServices `
                        -ComputerName $computer `
                        -Authentication 6 `
                        -ErrorAction Stop
        } catch {
            Write-Host "$computer : WMIQueryFailed"
            Continue
        }

        if ($rdp.AllowTSConnections -eq 1) {
            Write-Host "$computer : RDP Already enabled"
            continue
        } else {
            try {
                $result = $rdp.SetAllowTSConnections(1,1)
                if ($result.ReturnValue -eq 0) {
                    Write-Host "$computer : Enabled RDP Successfully"
                } else {
                    Write-Host "$computer : Failed to enable RDP"
                }
            } catch {
                Write-Host "$computer : Failed to enable RDP"
            }
        }
    }

    end {}
}