You must use specific services to configure the Active Directory Domain Controller.

Server Role

Use

DHCP Server

Desktops on VLAN 1001

Domain Services

Active Directory Domain vrn.local

DNS Server

vrn.local, 0.16.172.in-addr.arpa, and 1.16.172.in-addr.arpa zones

NTP Server

w32tm peered to accurate time sources

Certificate Authority

LDAPS during domain bind