Windows has a built-in function to do time synchronisation 2012 r2

Windows has a built-in function to do time synchronisation. And by default it gets the time from time.windows.com. There is no need to use a third-party application.

You can (but you should not need to) change the settings by right-clicking the clock in the taskbar > Adjust date/time > Internet Time.

Or from the command line:

w32tm /config /syncfromflags:manual /manualpeerlist:time.windows.com /update