[Samba] How do I become a domain admin?

[Michael Keightley]

Just setup a new domain controller running Samba-3.0.20b.
Using smbpasswd file (no LDAP).  
How do I setup a group of users so they become domain administrators?

I thought I just typed this: 

% net groupmap modify ntgroup="Domain Admins" unixgroup=ntadmin

I am in group unix ntadmin, but I'm it doesn't seem to work.

Michael
-- 
Michael Keightley <Michael.Keightley at quadstone.com>    Tel: +44 131 220 4491
Systems Manager,  Quadstone Limited,                   Fax: +44 131 220 4492
16 Chester Street,  Edinburgh EH3 7RA,  Scotland       http://www.quadstone.com