Is it possible to use 2 PDC on 1 samba domain to provide fault tolerrant? According to this, yes it is possible : http://www.unav.es/cti/ldap-smb/ldap-smb-2_2-howto.html But on MS NT domain it's impossible, only PDC allowed per domain. I've arround 1000 users (win and linux) on 4 different locations, and all are managed by openldap 2.1.x. It should has 4 different NT domains. What is the best way to setup fault tolerant, 1 PDC and 2 BDC per location or all PDC per location? Tks. --beast