> How to configure Samba 3.0.9 as a BDC server ? You don't. A Samba DC'd network operates as a multiple-PDC network, not as a PDC/multiple-BDC network. Simply configure multiple PDC boxes (setting the SID manually on the second, third, ... to be the same as the first PDC). This neccesitates the use of an LDAP SAM.