Powershell: Quick Search

Measure-Command
{
    Get-AdUser -Filter {
        ExtensionAttribute11 -eq 'NON'
    }
    -SearchBase 'Desired OU,DC=xxxx,DC=xxxx,DC=xxxx,DC=xxxx' # OU and DC parts
    -Properties ExtensionAttribute11 |
        Select name, ExtensionAttribute11, ExtensionAttribute13, Department, ...
}