A few questions about DNS Forwarding

General questions
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1

The documentation is very concise and I have a few questions for respected experts.
I have LAN AD domain ‘intra.domain’ with Domain Controller’s name servers. I’m using DNS Forwarding with this configuration:

dns {
    forwarding {
        allow-from "192.168.0.0/16"
        domain 134.168.192.in-addr.arpa {
            name-server 192.168.134.1 {
            }
            name-server 192.168.134.20 {
            }
        }
        domain intra.domain {
            name-server 192.168.134.1 {
            }
            name-server 192.168.134.20 {
            }
        }
        listen-address "192.168.134.23"
        listen-address "127.0.0.1"
        name-server 1.1.1.1 {
        }
        no-serve-rfc1918
    }
}

Under what circumstances have I to add domain command

  1. ‘addnta’?
  2. ‘recursion-desired’?

And one more question. Is it possible to force this configuration to respond with the Authoritative Answer (AA) bit, like the Authoritative server?