CurrentlyLoggedOnUsers.ps1

$pcs = (Get-ADComputer -Filter * | ? { Test-Connection $_.DNSHostName -Quiet -Count 1 }).DNSHostName

Invoke-Command -ComputerName $pcs -ScriptBlock {
    $result = query user
    $success = $result[1] -match "^[> ]([^ ]+) +([^ ]+) +([0-9]+) +([^ ]+) +([^ ]+) +(.+)$"
    if ($success) {
        New-Object PSObject -Property @{
            PC = $env:computername;
            Benutzername = $Matches[1];
            Sitzungsname = $Matches[2];
            Id = $Matches[3];
            Status = $Matches[4];
            Leerlauf = $Matches[5];
            Anmeldezeit = $Matches[6];
        }
    } else {
        Write-Error "Parse Error whilst parsing: $result"
    }
} | Out-GridView -Title "Currently Logged On Users"