Danke zunächst für Deine Hilfe!
Ich habe keine speziellen Parameter, am neuen System läuft testparm dieser CONF ohne Probleme. Mit dem Begriff "FAKE-ROOT" kann ich so richtig nichts anfangen.
In meinem LDAP-Tree gibt es einen Root-User (sysroot) der die UID ..-1000 hat. Mit dem band ich bisher die Clients ein.
Klar, die Well-Known-SID's sind vorhanden. Ich nutze aber nur die "Domain Admins" und die "Domain Users".
Hier meine smb.conf des PDC:
[global]
workgroup = myDomain
netbios name = SRVPDC1
hosts allow = 127.0.0.1 meine-IP-Range
hosts deny = 0.0.0.0/0
add machine script = /usr/local/sbin/smbldap-useradd -w "%m"
add user script = /usr/local/sbin/smbldap-useradd -a "%u"
delete user script = /usr/local/sbin/smbldap-userdel "%u"
add group script = /usr/local/sbin/smbldap-groupadd -a "%g"
delete group script = /usr/local/sbin/smbldap-groupdel "%g"
add user to group script = /usr/local/sbin/smbldap-groupmod -m "%u" "%g"
delete user from group script = /usr/local/sbin/smbldap-groupmod -x "%u" "%g"
set primary group script = /usr/local/sbin/smbldap-usermod -g "%g" "%u"
encrypt passwords = Yes
map to guest = Never
syslog = 1
log level = 1
log file = /var/log/samba/%m.log
max log size = 5000
time server = Yes
unix extensions = Yes
admin users = @"Domain Admins"
passwd chat debug = Yes
passwd program = /usr/local/sbin/smbldap-passwd "%u"
passwd chat = *new*password* %n\n *new*password:* %n\ *successfully*
domain logons = Yes
os level = 200
preferred master = Yes
domain master = Yes
wins support = Yes
socket options = TCP_NODELAY SO_KEEPALIVE SO_RCVBUF=24576 SO_SNDBUF=24576
logon path =
passdb backend = ldapsam:ldap://srvpdc1.myDomain.loc
ldap passwd sync = Yes
ldap suffix = dc=myDomain,dc=loc
ldap machine suffix = ou=computer
ldap user suffix = ou=user
ldap group suffix = ou=groups
ldap admin dn = cn=ldapadmin,dc=myDomain,dc=loc
ldap ssl = no
[netlogon]
comment = Netlogon Freigabe
path = /home/samba/netlogon
write list = +"myDomain\Domain Admins"
valid users = +"myDomain\Domain Users"
browseable = No
guest ok = No