Hi My People, I am looking for the best tool or method for Linux authentication like Ms Active Directory: Scenarios 1. Samba PDC for Linux Clients and Windows Xp Status: (Server Centos OS 4.3 Samba 3.023 Setup Ready, Windows Clients Ready can logon, Linux Clients Centos 4.3, Ubuntus 6,06 and Suse 10. Fail to logon error: Utils/net_rpc_join.c:net_rpc_join_newstyle(295) Error setting trust account password: NT_STATUS_ACCESS_DENIED Unable to join domain mydomain.com.ve 2. Samba PDC with Ldap Comments about. 3. Samba with Fedora Directory Status: (The Same) I will revise it because show easy talk with Ms Active Directory, I have already setup Fedora Directory and I will join samba with it. 4. Your recommendations So really we want logon our linux clients in our linux PDC. Best regards Jose Perales Grid Systems