定义OU和CSV文件路径

$ouPath = "OU=Workstations,DC=contoso,DC=com"
$csvPath = "C:\temp\computer-list.csv"

使用Get-ADComputer cmdlet获取OU中的计算机列表

$computers = Get-ADComputer -SearchBase $ouPath -Filter * -Properties lastlogondate,description

遍历每台计算机并获取描述和上次登录的用户

foreach ($computer in $computers) {
      $description = $computer.Description
      $lastLoggedOnUser = $computer.LastLogonUser
      $data = [PSCustomObject]@{
      "Computer Name" = $computer.Name
      "Description" = $description
      "Last Logged On User" = $lastLoggedOnUser
      }

将计算机数据添加到CSV文件

$data | Export-Csv -Path $csvPath -Append -NoTypeInformation
}

AFAIK没有名为LastLogonUser的AD计算机属性或任何其他包含此信息的属性。若要获取上次登录的用户，您需要查询该计算机上的windows事件日志，并搜索ID为4672的事件
另外，如果除了返回的默认属性之外，您只想返回Description属性，则不要使用-Properties *。
试试看：

$searchBase = "OU=Computers - Disabled,DC=XXXXX,DC=com"
$Computers  = Get-ADComputer -LDAPFilter "(Name=LN-*)" -SearchBase $searchBase -Properties Description

$results = foreach ($machine in $Computers) {
    # to get the username who last logged on, you need to query the Security log
    $events = Get-WinEvent -ComputerName $machine.Name -FilterHashtable @{Logname='Security';ID=4672} -MaxEvents 50 -ErrorAction SilentlyContinue
    $lastLogon = if ($events) { 
                    (($events | Where-Object {$_.Properties[1].Value -notmatch 'SYSTEM|NETWORK SERVICE|LOCAL SERVICE'})[0]).Properties[1].Value
                 }
                 else { 
                    "Unknown" 
                 }
    # output an object
    [PsCustomObject]@{
        ComputerName     = $machine.Name
        Description      = $machine.Description
        LastLoggedOnUser = $lastLogon
        CurrentUser      = (Get-CimInstance -ClassName Win32_ComputerSystem -ComputerName $machine.Name -ErrorAction SilentlyContinue).UserName
    }
}
$results | Export-Csv -Path 'C:\Somewhere\Computers.csv' -NoTypeInformation

P.S.您当然需要管理员权限来查询事件日志，因此（如果您不是域管理员）您可能还需要在Get-WinEvent行上使用-Credential参数。