Dear All ... I set a samba and webmin server. Currently when I set my XP pro station as "work group" member (workgroupname is "INAXSMB"), it can login to samba with proper username and password (defined via webmin) But when I change the network type from "workgroup" to "domain" it say "the user name could not be found". Here is my smb.conf #####START############# [global] passwd chat debug = yes name resolve order = wins bcast hosts passwd chat = *Enter\snew\sUNIX\spassword:* %n\n *Retype\snew\sUNIX\spassword:* %n\n . idmap gid = 15000-20000 add group script = /usr/sbin/groupadd %g delete group script = /usr/sbin/groupdel %g add user to group script = /usr/sbin/usermod -G %g %u username map = /etc/samba/smbusers passwd program = /usr/bin/passwd %u passdb backend = tdbsam wins support = true netbios name = erp_int writeable = yes server string = %h server (Samba, Ubuntu) idmap uid = 15000-20000 default = global unix password sync = yes remote announce = 192.168.0.0 workgroup = inaxsmb os level = 64 add user script = /usr/sbin/useradd -m %u security = user add machine script = /usr/sbin/useradd -s /bin/false/ -d /var/lib/nobody %u delete user script = /usr/sbin/userdel -r %u log level = 3 domain master = yes domain logons = yes # Useradd scripts # sync smb passwords woth linux passwords # set the loglevel [homes] comment = Home valid users = %S read only = no browsable = no [netlogon] comment = Network Logon Service path = /home/samba/netlogon admin users = Administrator valid users = %U read only = no [profile] comment = User profiles path = /home/samba/profiles valid users = %U create mode = 0600 directory mode = 0700 writable = yes browsable = no [bag_umum] comment = Bag.Umum path = /home/samba/bagumum #####END############# Basically, I want every user has to be authenticated before it can joint the samba shares. Is it doable just with "workgroup" ? or is it need "PDC" ? If it need PDC , how to set samba as PDC ? and how to set windows client to able to joint that PDC ? Kindly please give me any of your enlightment. Sincerely -bino-