Hello, How can I to join for the PDC itself? net ads join -U root@SCHOOL [2012/02/12 07:05:19.510351, 0] param/loadparm.c:7504(lp_set_enum_parm) WARNING: Ignoring invalid value 'yes ;This defines it as the Primary Domain Controller' for parameter 'domain master' Host is not configured as a member server. Invalid configuration. Exiting.... #Domain name workgroup = SCHOOL #The Server Name netbios name = proba #server string = Samba #Time server, Workstations will set their time by this server time server =yes passdb backend = tdbsam #SECURITY AND LOGIN SETTINGS #This must be a user in PDC security = domain bind interfaces only = yes #Windows XP/2000 encrypt passwords = yes #Login in settings. domain logons = Yes #Error Logs, Comment it out when you in production. log level = 3 #PDC and MASTER BROWSER SETTINGS #os level = 64 #Windows for master PDC. Highers windows can get is 32 preferred master = yes #local master = yes domain master = yes ;This defines it as the Primary Domain Controller #Add delete users on linux and samba (keeps linux and samba accounts in sync) add user script = /usr/sbin/useradd -m %u add machine script = /usr/sbin/useradd -s /bin/false/ -d /var/lib/nobody %u delete user script = /usr/sbin/userdel -r %u 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 #User Profiles and Home directory. logon drive = H: ...................................