Enable-RemotePSRemoting.ps1

function Enable-RemotePSRemoting
{
    [cmdletbinding()]

    Param(
        [Parameter(Mandatory = $True,Position = 0,ValueFromPipelineByPropertyName = $True)]
        [string[]]$ComputerName,
        
        [Parameter(Mandatory = $False)]
        [switch]$Force,
        
        [Parameter(Mandatory = $False)]
        [pscredential]$Credential = $null
    )

    Begin{
        $InvokeArgs = @{
            Path         = 'win32_process'
            Name         = 'Create'
            ArgumentList = 'powershell.exe -NoProfile -ExecutionPolicy Bypass -Command Enable-PSRemoting -Force'
            ErrorAction  = 'Stop'
        }

        $TestWsmanArgs = @{
            ErrorAction = 'SilentlyContinue'
            ErrorVariable = 'NoWsmanResponse'
        }
        
        If($null -ne $Credential)
        {
            $InvokeArgs.Credential = $TestWsmanArgs.Credential = $Credential
        }
    }

    Process{
        Foreach($Computer in $ComputerName)
        {
            If(-not (Test-Connection -ComputerName $Computer -Quiet -Count 1))
            {
                Write-Warning -Message "Cannot connect to $Computer. Verify that the computer exists on the network and that the name provided is spelled correctly."

                Continue
            }
            
            $Response = Test-WSMan @TestWsmanArgs -ComputerName $Computer

            If($Response -and -not $Force)
            {
                Write-Verbose -Message "[$Computer] PSRemoting is already enabled."

                Continue
            }

            Write-Verbose -Message "[$Computer] Enabling PSRemoting ..."

            Try
            {
                $null = Invoke-WmiMethod @InvokeArgs -ComputerName $Computer
            }
            Catch
            {
                Write-Warning -Message "[$Computer] Unable to create remote process. $($_.Exception.Message)"

                Continue
            }

            $Timer = [System.Diagnostics.Stopwatch]::StartNew()

            $WSManEnabled = $null
                
            do
            {
                $WSManEnabled = Test-WSMan @TestWsmanArgs -ComputerName $Computer
            }
            until($WSManEnabled -or $Timer.Elapsed.TotalMinutes -gt 1)
        
            If($WSManEnabled)
            {
                Write-Verbose -Message "[$Computer] PSRemoting enabled successfully."
            }
            Else
            {
                Write-Warning -Message "[$Computer] Failure. PSRemoting not enabled."
            }
        }
    }

    End{}
}