Samba as BDC only?

[Tife Chan]

Hi all,

I have a NT machine running as a PDC server, 
and there is a samba server with domain logon enabled for pptp user logon.
Now there is a problem that when the NT PDC goes down,
the samba server pick up the PDC roles. So when the NT PDC boot up again
the netlogon service will not start.
Therefore, is it possible to configure a samba server as BDC only?

Thanks,
Tife