Powershell: RDP log user account off of all servers using jobs.

#Log User account off all servers
# Tony Unger
# 

$Domain = "Microsoft.com"
$Servers = Get-ADComputer -Filter {(OperatingSystem -Like "Windows Server*")-and (enabled -eq "true")} -Property SamAccountName -Server $Domain Select -expand Name
$username = read-host "Enter Users Name:"
$i = 0

$scriptblock = {
 param(
 [string]$server,
 $Username
 )

$queryResults = (qwinsta /server:$server $Username| foreach { (($_.trim() -replace "\s+",","))} | ConvertFrom-Csv)
 foreach ($queryResult in $queryResults){
  Logoff /server:$server $queryResult.id
 }
}
$TotalServersCount = $Servers.count
foreach($server in $Servers){
$i++
    $running = @(Get-Job | Where-Object { $_.State -eq 'Running' })
 Write-Progress -Activity "logging off user" -status "Currently on $server -- $i of $TotalServersCount" -percentComplete ($i / $Servers.count*100)
 if ($running.Count -le 50) {
        Start-Job -ScriptBlock $scriptblock -Name $server -ArgumentList $server, $username
    }
 else {
         $running | Wait-Job
    }
}

while ($running.Count -ge 1) {
      sleep 1
    $running = @(Get-Job | Where-Object { $_.State -eq 'Running' })
 Remove-Job -State Completed
}