Простите, что?…
Вот написано, сразу на главной. Что нужно сделать перед настройкой, иначе может ничего не работать.
Make sure that your future DC uses a static IP address. DHCP can cause trouble if the address changes.
If resolvconf is installed on your future DC, you should remove this or it may alter your /etc/resolv.conf to point to the wrong nameserver.
Read carefully the Active Directory Naming FAQ for information, frequent pitfalls, etc. about choosing a DNS and NetBIOS name for your AD. Currently Samba AD does not support changing this, so this makes it to an important decision!