Information:
The following information explains the Best practices for DNS client settings on Domain Controller and Domain Member.

Domain controller with DNS installed:
On a domain controller that also acts as a DNS server, recommended that you configure the domain controller’s DNS client settings according to these specifications:

IP configuration on domain controller:

• In single DC/DNS in a domain environment,  DC / DNS server points to its private IP address (not to loopback 127.x.x.) as preferred DNS server in TCP/IP property.
• If multiple DCs that’s the DNS servers are in a domain environment, recommendation to have all DCs point to ANOTHER/REMOTE DC’s IP address as preferred DNS and then point to it’s private IP address as an alternate DNS.
• Each DC has just one IP address and one network adapter is enabled (disable unused NICs).
• IPv6 should not be disabled on DC’s NIC card. Set it to “obtain IPV6 address automatically” and “obtain…