What does DCDIAG actually… do?

Hi folks, Ned here again. I recently wrote a KB article about some expected DCDIAG.EXE behaviors. This required reviewing DCDIAG.EXE as I wasn’t finding anything deep in TechNet about the “Services” test that had my interest. By the time I was done, I had found a dozen other test behaviors I had never known existed…. Read more

One Stop Shop for Windows Time Information

Hi folks, Ned here again. After much noodling and work here with our TechNet writer team, there is a new, consolidated set of info for Windows Time (w32time) in all of our operating systems, to include Windows 7 and Win2008 R2. All of it can be found here: Windows Time Service Technical Reference This includes updated… Read more

Userenv 1054 events as a result of time-stamp counter drift on Windows Server 2003 guests running in Hyper-V

Hello everyone, Brian here. I was working with a colleague on an issue in which the customer was receiving the following Userenv event in their application event logs: (Event ID 1054) Windows cannot obtain the domain controller name for your computer network. (An unexpected network error occurred.). Group Policy processing aborted. The customer explained to… Read more

Configuring an Authoritative Time Server with Group Policy Using WMI Filtering

Hello everyone, Brian Singleton here. Here’s a question I often get from customer regarding Windows Time: “Is there a way I can configure the Windows Time settings via Group Policy and have it only apply to the domain controller that holds the PDC FSMO role?” This is a wonderful question to pose and there are… Read more

Preventing large time offset problems

Greetings, Todd here and I wanted to take a few moments to talk to you about an issue that arises from time to time. I will start this time-related issue exploration with a worst case scenario. The Primary Domain Controller Emulator (also known as the PDCe) in your forest root has a hardware issue which… Read more

Configuring your PDCE with Alternate Time Sources

Bob Drake from Microsoft again. Often we see situations where the forest root domain PDCE is configured to acquire time from a specified authoritative NTP source but cannot due to issues outside of the local network (IE: DNS, Routing). Typically the first signs of an issue are errors like Event ID 29: “The time provider… Read more

High Accuracy W32time Requirements

Hello there. I’m Bob Drake from Microsoft’s Directory Services Team. Quite often we get inquiries on how to configure networks for high accuracy time needs.  In some cases, customers want the time accurate down to the second.  There are a lot of occasions where high accuracy is imperative (applications in the banking industry, air traffic… Read more