Maybe this will help. It's from the Samba HOWTO at http://us1.samba.org/samba/docs/
. I clicked on the PDF link and saved it, then opened it and searched on 'domain admin group'.
I can't tell you what it means
, but the answer must be there in Chapter 12 somewhere, eh?
12. Group Mapping MS Windows and UNIX
Starting with Samba-3, new group mapping functionality is available to create associations
between Windows group SIDs and UNIX groups. The groupmap subcommand included with
the net tool can be used to manage these associations.
The new facility for mapping NT Groups to UNIX system groups allows the administrator to
decide which NT Domain Groups are to be exposed to MS Windows clients. Only those NT
Groups that map to a UNIX group that has a value other than the default (-1) will be exposed
in group selection lists in tools that access domain users and groups.
The domain admin group parameter has been removed in Samba-3 and should
no longer be specified in smb.conf. This parameter was used to give the listed
users membership in the Domain Admins Windows group which gave local
admin rights on their workstations (in default configurations).