thanks vishesh, one more query
thanks for you reply, even i was thinking to configure Samba as PDC. just i was confused about open ldap. can i know how well openladp work's. what exactly replication mean ? is that like raid replication ( securing data, clustering ). even i heard ldap authentication is better than samba PDC. As samba PDC will be slower,while adding windows workstratios as clents to Redhat Domain. how can an employee change his password at client PC after loging in, is that posible in samba PDC setup.