NTP service on turnkey domain controller

Hello, 

I installed turnkey domain controller as production in my company and it is working fine and I moved from manual samba4 installation to trunkey, but I tried to find the NTP service because I was using my old DC as NTP server but I cannot find it on new server, how trunkey DC manage time on windows clients and how it sync the time, and if I need to install the NTP on it, is there any issue with this 

Thanks