This what I call my basic Zentyal install.
In the software modules I am going to pick, DHCP, DNS, Firewall and NTP.
Click install and then when the processes chill click save.
Then add a default scope for the DHCP for my LAN, imaginatively called LAN.
Make sure the DHCP NTP is set to local Zentyal as important to Kerberos.
My scope start at x.x.x.65 to leave some space for statics, its up to you.
Again enable those modules in module status.
You might get a strange message about corruption on each enable.
https://localhost:10100 and refresh to get back.
Wait for the processes to slow and click save.
You might also want to add the Ubuntu updates at this stage. Software management > System Updates
Have my basic Zentyal setup and a reboot will do no harm. In this case I am going to shut down and clone my VM.
System > Halt / Reboot > Reboot