Well... it's been over a year!  I just recently got back to this (in the last week) and was able to figure out the required config based on a working Samba PDC.  It's actually a quite easy customization.    The migration of users from one domain to this new domain is beyond the scope of this guide.   Instructions   On Settings tab in unRAID GUI set the following:   Enable SMB = Yes Security Mode = Workgroup Local master = Yes Workgroup = [your domain name]   Copy the follow