Powershell, neue Spalte einer Liste hinzufügen

$CsvFileImport = "C:\Temp\expired_users.csv"  
$CsvFileExport = "C:\Temp\expired_users_adstatus.csv"  
$UserEntries = Import-Csv -Path $CsvFileImport -Delimiter ";" | Where-Object {$_.country -eq "DE"}  

$UserExport =@()

foreach ($user in $UserEntries) {
    $userID = $user.email.Substring(0,$user.email.IndexOf("@"))  

    if (Get-ADUser -Filter {Name -eq $userID}) {
        $AdStatus = "User im AD gefunden"  
    }
    else {
        $AdStatus = "User nicht im AD gefunden"  
    }

    $UserExport += $user, $AdStatus
}

$UserExport | select customerId, corporateId, email, firstName, lastName, country, status, AdStatus # | Export-Csv $CsvFileExport -Delimiter ";" -NoType -Encoding UTF8