SNTP is used in non-domain-joined computers. (This includes Windows Server-based computers.)
Windows XP and later versions of the Windows operating system implement NTP.
Under the right conditions you can maintain 1 ms accuracy with regard to UTC. With careful attention to your computer and network environment, and a solid time source which is accurate and reliable, you should be able to achieve 1 ms accuracy.
For more information and details, please see the Windows 2016 Accurate Time document on TechNet.
For more information about the W32Time service, go to the following Microsoft TechNet website:
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
Article ID: 939322 - Last Review: Oct 24, 2016 - Revision: 1