Hi, I am trying to setup Samba with LDAP Authentication. I am using Samba Version 3.0.25b-0.el5.4 and OpenLDAP: slapd 2.3.43. I was able to run Samba with tdbsam as password backend and was able to join machine and authenticate XP users at logon. Using the same configuration I have inserted all the directives required for ldap password backend, and am able to join a machine to domain. The problem is when I try to login to the Domain using the username/password defined in ldap, I get the following message at logon prompt. "The system cannot log you on due to following error: The system cannot find message text for message number 0x%1 in the message file for %2. Please try again or consult your system administrator." and drops me back to the login prompt. Is this some kind of bug, in Samba/Openldap/Windows ? Please help. If I dont log into domain and access the share using local system accounts I am able to access all the shared folders for that user. I am posting smb.conf below [global] workgroup = MYDOMAIN netbios name = mydomain os level = 33 preferred master = yes enable privileges = yes server string = %h server (Samba, Centos5) dns proxy = no name resolve order = wins bcast hosts log file = /var/log/samba/log.%m log level = 5 max log size = 1000 syslog only = no syslog = 0 panic action = /usr/share/samba/panic-action %d encrypt passwords = true ldap passwd sync = yes # passdb backed = tdbsam passdb backend = ldapsam:ldap://127.0.0.1 ldap admin dn = "cn=Manager,dc=domain,dc=in" ldap suffix = dc=domain,dc=in ldap group suffix = ou=groups ldap user suffix = ou=users ldap machine suffix = ou=computers passwd program = /usr/sbin/smbldap-passwd -u %u passwd chat = *Enter\snew\sUNIX\spassword:* %n\n *Retype\snew\sUNIX\spassword:* %n\n *password\supdated\ssuccessfully* . socket options = TCP_NODELAY domain master = yes local master = yes wins support = yes domain logons = yes preferred master = yes admin users = root admin security = user Thanks and Regards Bharat