This procedure is the same, when changing from your PDC environment select ADS with all ADS server information Password and Username. Please make sure DNS, Server Time on both systems are set properly. Also remember ADS uses Kerberos (Please review Microsoft Kerberos documentation) please check all Kerberos in your Windows server and review any ticket or life of tickets, this is located in the GPO of your Windows server (please review your Windows documentation). Also add the NAS computer in you ADS and make sure all your users are trusted. If you are still experiencing any issues please send logs to support@open-e.com