w32time supports proper NTP (albeit NTPv3), and Windows Server 2016/Windows 10 Anniversary is capable of 1-millisecond accuracy: https://docs.microsoft.com/en-

w32time supports proper NTP (albeit NTPv3), and Windows Server 2016/Windows 10 Anniversary is capable of 1-millisecond accuracy: https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/get-started/windows-time-service/windows-2016-accurate-time https://docs.microsoft.com/en-us/windows-server/identity/ad-... But if that isn't good enough for you, you can easily replace w32time with the reference NTP implementation, which is what I do to all of my Hyper-V hosts and physical forest root PDCs: https://www.meinbergglobal.com/english/sw/ntp.htm https://www.meinbergglobal.com/english/sw/ntp.htm