Disabling recursion - control lists option missing.

Hi,

I need to disable recursion on a server, but the server has no control lists showing at all, and the recursion option is missing from the control lists on the zone in DNS/DHCP Console. I has a dig in Imanager and couldn't fine the options there either.

Is there a cfg file or some way I can configure this manually?

DNS server is 6.5 sp8.

Thanks.