$Devices        = @()
$Resultes       = @()
$LogOutPut      = @()
$DeviceCount    = 0
$exitState      = 0

$Devices = Get-ADComputer -Properties * -Filter { OperatingSystem -like "Windows*"} |
Where-Object { $_.Enabled -eq $true } | Select-Object Name, DNSHostName, OperatingSystem, OperatingSystemVersion | Sort-Object Name


foreach ($Device in $Devices){
    if (Test-Connection -ComputerName $Device.DNSHostName -Quiet){
        $DeviceCount += 1
        $Resultes = Get-WmiObject Win32_LogicalDisk -ComputerName $Device.DNSHostName -Filter "DriveType=3" -ErrorAction SilentlyContinue | Select-Object DeviceID, Size, Freespace
        
        foreach ($Result in $Resultes | Where-Object {$_.DeviceID -like "C:"}){
            $Percentage = "{0:P0}" -f ($Result.Freespace / $Result.Size)
            
            if(($Result.DeviceID -eq "C:") -and ([int]$Percentage.Split("%")[0] -cle 10)){
                $LogOutPut  += [PSCustomObject]@{
                    HostName = $Device.DNSHostName
                    TotCapacity = "{0:N1}" -f ($Result.Size / 1gb) + " GB"
                    FreeSpace = "{0:N1}" -f ($Result.Freespace / 1gb ) + " GB"
                    FreePercentage = $Percentage
                }
            }
        }
    }
}

if ($LogOutPut.Count -eq 0){
    Write-Output "OK - All devices are in range!"
    Write-Output "     Devices found:    $($Devices.Count)"
    Write-Output "     Analyzed devices: $($DeviceCount)"
} else {
    $exitState = 2
    Write-Output "CRITICAL! - $($LogOutPut.Count) Devices with space issue!"
    Write-Output "     Devices found:    $($Devices.Count)"
    Write-Output "     Analyzed devices: $($DeviceCount)"
    $LogOutPut | Format-Table
}

Exit $exitState