Hi Guys, I have managed to configure samba authentication with AD. the ntlm_auth working fine. But when I try to access a samba directory It gives the following error [2011/03/23 21:48:32.072590, 2] auth/auth.c:314(check_ntlm_password) check_ntlm_password: Authentication for user [domainuserx.y] -> [domainuserx.y] FAILED with error NT_STATUS_NO_SUCH_USER [2011/03/23 21:48:32.522646, 2] auth/auth.c:314(check_ntlm_password) [2011/03/23 21:48:32.598577, 2] smbd/sesssetup.c:1391(setup_new_vc_session) But wbinfo -u /wbinfo -g gives the correct out put. (domain users/groups) Iam using latest stable version 3.5.8. Getent passwd returns only local user account passwords , not the domain. What could be the problem in my config. [global] workgroup = xxx realm = xxx.xx password server = * server string = Samba file and print server security = ADS encrypt passwords = yes log level = 2 log file = /var/log/samba/%m max log size = 50 winbind separator = + ##new #client schannel = no idmap cache time = 1800 idmap negative cache time = 300 winbind cache time = 1800 ##end new idmap uid = 10000-20000 idmap gid = 10000-20000 winbind use default domain = yes nt acl support = yes map acl inherit = yes winbind enum users = yes winbind enum groups = yes #client ntlmv2 auth = yes template homedir = /home/%D/%U template shell = /bin/bash ldap passwd sync = yes Thanks Tharanga