Hi, We will put in production a DC and a file-server. DC will use samba-4 file-server will use samba4 too as a member server. DC will use internal DNS for AD domain And file-server will have a DNS server ("main dns server" for manage normal domain and slave domain. We have also 2 slave dns server for main DNS server. In schema : ----------------------- srv1 DC FS - ----------------------- srv2 in smb.conf of DC, we will activate dns forwarder (DNS requests will be forwarded to FS if they can not be handled by Samba itself) And on client set DNS = IP of DC But can I set more dns forwarder (if FS ahve a problem or unreachable) Can I set on client or other server IP of DC IP of FS IP of srv1 Ip of srv2 in dns configuration thx St?phane Purnelle ----------------------------------- St?phane PURNELLE Admin. Syst?mes et R?seaux Service Informatique Corman S.A. Tel : 00 32 (0)87/342467