Unlike the case of conditional forwarders, the forwarders’ settings are not replicated between DNS servers. … A second reason is that when you configure a DNS server on a DC, replicating the DNS zones becomes a much more robust and secure task, much more than if you’d be hosting the DNS role on a regular server.
Do DNS conditional forwarders replicate?
Conditional forwarding is now enabled for itillery.net and will be replicated to all other DNS servers in the AD forest. In the past, this functionality had to be configured on each DNS server individually.
Should I use DNS forwarders?
DNS Forwarding improves performance, load balances, and makes your network more resilient. It provides a way to pass on namespaces or resource records that are not contained in a local Domain Name System (DNS) server’s zone to remote DNS server for resolution of name queries both inside and outside a network.