[Samba] Samba 3.0 + LDAP + Machine accounts

[Robert Rati]

I'm trying to setup Samba 3.0 to talk to an LDAP server for 
authentication, but I can't get any communication to the LDAP server 
from Samba when a machine attempts to join the domain.  I see the 
machine sending out the broadcast request to join the domain, but the 
samba server does not respond (security = domain, domain logons = yes). 
  Does the samba server always have to authenticate the machine joining 
the domain, or can it pass it off to the LDAP server?  If domain logons 
= yes, does that mean the samba server will always authenticate the 
machine?  If so, how do you get samba to pass off the machine 
authentication to the LDAP server?

Rob