Run a command async on a set of computers

Invoke-WmiMethodAsync.ps1

#Requires -Version 3.0

<#
.SYNOPSIS
    Wraps Invoke-WmiMethod to run a command async
.DESCRIPTION
    Wraps Invoke-WmiMethod to run asynchronously on a number of computers
.PARAMETER Computer
    An array of computers
.PARAMETER Command
    Command to run
.PARAMETER Path
    Path to a file to save errors in CSV format
.EXAMPLE
    Invoke-WmiMethodAsync -Computer Server1,Server2,Server3 -Command notepad.exe -Path C:\errors.csv
.LINK
    None
.NOTES
    Author: skunkie
    Last modified: 21.12.2018
#>
[CmdletBinding()]
param(
    [Parameter(
        Mandatory=$true,
        Position=0)] [string[]] $Computer,
    [Parameter(
        Mandatory=$true,
        Position=1)] [string] $Command,
    [Parameter(
        Mandatory=$false,
        Position=2)] [string] $Path
)

Set-StrictMode -Version Latest

workflow Invoke-WmiMethodWF {
    param([string[]]$Computer,[string]$Command)
    foreach -parallel ($ComputerName in $Computer) {
        $err = InlineScript {
            try {
                Invoke-WmiMethod -Class Win32_Process -Name Create -ArgumentList $using:Command -ComputerName $using:ComputerName -ErrorAction Stop | Out-Null
            } catch {
                [PSCustomObject]@{'Computer' = $using:ComputerName; 'Error' = $_.Exception.Message}
            }
        }
        $err
    }
}

$errs = Invoke-WmiMethodWF -Computer $Computer -Command $Command | Select-Object -Property Computer, Error

if ($errs) {
    if ($Path) {
        Export-Csv -NoTypeInformation -UseCulture -Path $Path -InputObject $errs
    }

    Format-Table -InputObject $errs
}