Setup Active Directory Authentication
The steps must be performed in this order, otherwise you’ll get a headache trying to work out why you cannot see any Groups listed.
Go to Services | Enable SMB/CIFS server.
Click on SMB/CIFS Setup.
- Change the NetBIOS name to just the hostname of the server (do not include the domain).
Navigate to Accounts | Expert View. Configure for your environment, note the CAPITALIZATION of some of the fields.
Click on Use Kerberos 5 and enter your domain details, note the CAPITALIZATION of some of the fields.
Now click on Accounts | Group List and if done successfully, you should see your Domain groups.
VMwire 
Still it’s not working………..
https://vmwire.com/2011/06/13/how-to-setup-active-directory-authenticaton-on-openfiler/
Works like a charm, although the Openfiler server needed a reboot to show the users / groups from the active directory. Thanks!
Worked great on Windows 2003 AD, with a gazillion OUs.
Was a bit worried if everything will be compatible with everything else, and also my company’s AD is like 8 years old, spans 5 countries and has lots and lots of users…. Openfiler was pulling the user/group info for almost 10 minutes, but it looks like it coped, now I have 76 pages of groups, and almost 400 pages of users 😛
Thanks for the write-up 🙂
I wasted several days to get this working with different NAS-OS and an Windows Server 2012 R2 with AD.
My conclusion:
– Freenas: doesn’t work, users and groups are imported, samba just don’t like them.
– Openmediavault: doesn’t work. same as Freenas
– Openfiler: works like a charm. THX for your how-to!!!
I wish i would’ve started with this one…
Perfect!!! thanks a lot!!!