Support Why I can't use “Additional Domain Controller” to add the Turbo NAS to an Active Directory in Windows Server 2012 R2? Network & Security - Windows Domain & Active Directory Applied Models: All NAS Series Answer: This is a known SMB issue. Release date: 2014-04-08 Was it helpful? Yes. No. Thank you for your feedback. Thank you for your feedback. If you have any question, please contact firstname.lastname@example.org 9% of people think it helps.