Remote script

$Credential = Get-Credential
Invoke-Command -Computername "ServName" -ScriptBlock { $env:COMPUTERNAME} -Credential $Credential

Avec Argument

$Credential = Get-Credential
$script = {
        try{ $adPC = Get-ADComputer -Identity $args[0]}
        catch{$adPC = "Computer not existe"}
        return $adPC}
Invoke-Command -Computername "ServName" -ScriptBlock { $script} -Credential $Credential -ArgumentList "ComputerName"