Set NTP on Windows Client
Set the NTP server:
> NET TIME /SETSNTP:$ip-of-ntp-server
By default, the Windows NTP client is really braindead, it just
'sets' the system clock once a day, its not a proper NTP
implementation. for most users, this is fine, but realize oddities can
happen like the clock being set back a few seconds such that a given
time happens twice.
You can modify the time interval by editing your registry.
This will set it to update every two hours. The dword can be modified to
set it for 1 hour to whatever.