This will only disable NTP, not SEP overall. If you remove the NTP component, this will not be available.
Also, stop this go into SEPM and go to:
Clients
select a group to apply this to
Policies tab
For your specfic locations click on the + next to Location-specific Settings
Click on Server Control next to Client User Interface Control Settings
Select Customize next to Server Control
Uncheck Allow users to enable and disable Network Threat Protection