[Samba] Joining PDC w/LDAP Question

[Samba Newsgroups]

Should I be required to add the machine to my passwd file even if I am using
LDAP when joining a W2K domain domain?  The only way I can get a machine to
join my Samba PDC is via the following commands.

# /usr/sbin/useradd -g 100 -d /dev/null -c "asa" -s /bin/false asa$
# smbpasswd -a -m asa

I thought that using ldapsam would lookup all machine information from LDAP
without having to deal with passwd.  Any comments would be appreciated.
Thanks.