Forward only zones.

[Vbvbrj]

options {
allow-transfer { none; };
recursion yes;
forward first;
forwarders { a.b.c.d; };  // Forward to providers dns.
};
zone "my_domain.com" IN {
     type forward;
     forward only;
     forwarders { a.b.c.d; }; // Forward to Windows DNS.
};

I would like BIND to respond to local LAN like this: All queries for 
local domain my_domain.com to be forwarded to local Microsoft DNS to 
server Acrive Directory. Other queries to sites to forward to external 
dns servers.

But BIND does not forward everything to microsoft dns. I want that BIND 
forward every query and return answer, without any caching so that 
record updating, adding or deleting will be always up-to-date. When I 
try this configuration, BIND not forwarding every query. Answers from 
its cache, that may be out of date. Also, records not always are update 
when adding or removing computers from domain.