We have a PDC running Samba Version 3.0.24 while the BDC is running Samba Version 3.0.28a. Both domain controllers are running Gentoo. The problem seems to be a compatibility issue between two versions of Samba. Please see below the error when I tried joining the BDC. [2008/05/12 15:15:25, 0] utils/net_rpc_join.c:net_rpc_join_newstyle(310) error setting trust account password: NT code 0x1c010002 I believe that upgrading Samba on the PDC to version 3.0.28a will fix the problem but upgrade is not an option at this time. Upgrading Samba 3.0.28a will break a lot of its (PDC) functionalities. I've found similar issue on the web and the fix was to upgrade or downgrade Samba. I was wondering that maybe Simo or Gerry Carter can help me on this. Thanks!