Windows Time Service
The official blog site for the Windows Time Service
Impending GPS Week Number rollover
If you are synchronizing time from national NTP servers or servers that derive their time from...
Author: Sarath Madakasira MSFT Date: 04/06/2019
Windows Time Sync Accuracy Adendum is Available
We have published a new document which contains more details about our testing and measurement...
Author: Paul E Long Date: 12/16/2016
Windows Server 2016 Time Accuracy Improvements Video
We’ve posted a short video on Channel9 which provides a high-level discussion of the improvements to...
Author: Paul E Long Date: 10/04/2016
Windows Server 2016 Improvements in Time Accuracy
In 2017, governments are requiring stricter time accuracy with regards to UTC for financial...
Author: Paul E Long Date: 09/30/2016
Secure Time Seeding – improving time keeping in Windows
What year is it?...
Author: Sarath Madakasira MSFT Date: 09/28/2016
Moving Day
How the time flies. With over 2 years since the last post, it is high time we get this blog moving...
Author: Ryan Sizemore MSFT Date: 11/16/2011
NET TIME and w32time
It seems there is a bit of ambiguity out there regarding the relationship between w32time and the...
Author: Ryan Sizemore Date: 08/07/2009
Group Policy Settings Explained
In an effort to alleviate confusion around the Windows Time Service group policy settings, here is a...
Author: Ryan Sizemore Date: 02/02/2009
Demystifying Group Policy Settings
The settings for the Windows Time Service exposed through group policy have long been seen as a bit...
Author: Ryan Sizemore Date: 01/30/2009
Configuring an Authoritative Time Server with Group Policy Using WMI Filtering
Brian Singleton has posted on article on configuring w32time via Group Policy using WMI on the AskDS...
Author: Ryan Sizemore Date: 12/05/2008
Getting ahead of the storm
For those out there who haven't yet heard, VMWare is experiencing a problem (as of Aug 12) with...
Author: Ryan Sizemore Date: 08/12/2008
Reasons for limited time sync accuracy in Server2012R2 and older releases
(.. .and limited default time sync accuracy in AD Forests with Server2016+ servers...) More than any...
Author: Ryan Sizemore Date: 06/10/2008
To be (reliable) or not to be (reliable)
Of the many things that w32time does, figuring out which host to sync from is one of the most...
Author: Ryan Sizemore Date: 05/30/2008
Configuring a Standalone NtpServer
Recently, I had a customer ask if they can use w32time as a time source for other computer &...
Author: Ryan Sizemore Date: 04/02/2008
Configuring the Time Service: Max[Pos/Neg]PhaseCorrection
In the last few months of the Windows Server 2008 development, a good friend of mine was discussing...
Author: Ryan Sizemore Date: 02/28/2008
Configuring the Time Service: Enabling the Debug Log
The debug log is a powerful tool in the W32Time bag of tricks when you need to figure out why...
Author: Ryan Sizemore Date: 02/28/2008
Configuring the Time Service: NtpServer and SpecialPollInterval
One of the most talked about configuration options for W32Time has to be the list of time sources...
Author: Ryan Sizemore Date: 02/26/2008
A Tale of Two Clocks
In the very first post, I tried (for better or worse) to summarize the purpose of the Windows Time...
Author: Ryan Sizemore Date: 10/31/2007
Keeping the Domain On Time
Windows Time Service on a domain (referred to as 'Domain Synchronization' or 'Domain Sync' for...
Author: Ryan Sizemore Date: 09/04/2007
We don't measure time. We define it.
It sounds a bit egotistical, but in fact, it is quite correct. I was recently reading an interesting...
Author: Ryan Sizemore Date: 08/09/2007
What is Windows Time Service?
Welcome to the Windows Time Service blog. This blog is here to answer some of the questions about...
Author: Ryan Sizemore Date: 07/07/2007