Best method to setup time sync on a Hyper-V environment  Active Directory 2008 Server Guest?

Posted on 2015-02-17
Medium Priority
Last Modified: 2015-02-20
I have several sites that have a single physical Hyper-V (full) 2012 R2 Server.  The Hyper-V host server is not in the domain.  One of guests in an Active Directory Windows Server 2008 VM.  The other couple of guests are Windows Server 2008 member servers that belong to the domain.

Integration Services is implemented for all the guests, including the active directory server.

I believe the active directory server is the authorative time server for the domain.

I suspect the domain server time sync is implemented but that the Integration Services time sync is also implemented and worry this could lead to odd time sync issues.

What's the best practice in regards to how this type of configuration should be setup?  Integration Time Sync turned off on one or more of the VMs?  Domain style time sync turned off somehow?  Custom registry mods?  Nothing?
Question by:AnthonyMCSE
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
LVL 53

Assisted Solution

by:Will Szymkowski
Will Szymkowski earned 400 total points
ID: 40614593
Take a look at the following link which outlines the best practices for running a domain controller in a Hyper-V environment.
LVL 34

Accepted Solution

it_saige earned 1600 total points
ID: 40614597
You want to disable the Integration Services Time Sync on any VM DC's.


Author Comment

ID: 40614677
The article Will posted appears to be applicable for Windows Server 2008 R2 and it also says to disable Time Sync under Integration Services.  I have a couple sites where the Hyper-V host is Windows Server 2012 R2.  Is this good advice for these sites as well?

I have several other guest VM's on the same Hyper-V host as well, these are Windows Server 2008 R2 guests that also belong to the domain.  Should they have Integration Services Time Sync turned off as well and in turn rely on the domain controller for correct time?  

It appears that there is competing time source, as this log shows, currently on one of my Windows Server 2008 VMs between the domain controller and integrated services time sync.  The query results below were taken from the same machine in succession:

C:\Users\administrator.DFP>w32tm /query /status
Leap Indicator: 0(no warning)
Stratum: 3 (secondary reference - syncd by (S)NTP)
Precision: -6 (15.625ms per tick)
Root Delay: 0.1249542s
Root Dispersion: 1.7611385s
ReferenceId: 0xC0A800CA (source IP:
Last Successful Sync Time: 2/16/2015 5:43:12 PM
Source: dfp-server.dfp.local
Poll Interval: 10 (1024s)

C:\Users\administrator.DFP>w32tm /query /status
Leap Indicator: 3(last minute has 61 seconds)
Stratum: 0 (unspecified)
Precision: -6 (15.625ms per tick)
Root Delay: 0.0000000s
Root Dispersion: 0.0100000s
ReferenceId: 0x00000000 (unspecified)
Last Successful Sync Time: 2/16/2015 5:58:03 PM
Source: VM IC Time Synchronization Provider
Poll Interval: 10 (1024s)
Prepare for your VMware VCP6-DCV exam.

Josh Coen and Jason Langer have prepared the latest edition of VCP study guide. Both authors have been working in the IT field for more than a decade, and both hold VMware certifications. This 163-page guide covers all 10 of the exam blueprint sections.

LVL 34

Expert Comment

ID: 40614695
With regard to time services, I can confirm that it is still very applicable.  I had a domain where the time was off by 5 minutes because of the Time Sync from the Integration Services.  After disabling the Time Sync in the Integration Services, the time was accurate.  Again, this only applies to Guest OS's that are DC's, member servers and computers are not affected.


Author Comment

ID: 40614769

So what do you think about the log above, where the member server VM that is in the same domain appears to be syncing with two different sources?  Just don't worry about it?

Author Comment

ID: 40614810
Also, after turning off the virtual DC's integrated services time sync, I'd need to set it up to sync to an external source, right?  So far, it is the only DC...
LVL 34

Expert Comment

ID: 40614820
These are the results I would expect:

Windows Server 2012 R2 VM DC (PDCe FSMO Holder) -Time synchronized from external time source.Windows Server 2012 R2 VM DC -IP of PDCe FSMO Holder is Server 2008 VM Member Server -Capture.JPG
On these VMs, the Time Sync Integration Service is disabled on the DC's but not on the member server -DC01 (PDCe FSMO Holder) Time synchronization is disabledDC02 Time synchronization is diabledMember server - Time synchronization is enabled.
If you are seeing inconsistent results, ensure that your member servers and non-PDCe DC's are using DOMHIER in their time configuration:
w32tm /config /syncfromflags:domhier /update

Open in new window


LVL 34

Expert Comment

ID: 40614825
Correct.  Here is a previous EE PAQ discussing Windows Time Services, I also discuss using a GPO policy and WMI filter so that you don't have to futz with registry settings or command lines on the PDCe.



Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I was prompted to write this article after the recent World-Wide Ransomware outbreak. For years now, System Administrators around the world have used the excuse of "Waiting a Bit" before applying Security Patch Updates. This type of reasoning to me …
In the absence of a fully-fledged GPO Management product like AGPM, the script in this article will provide you with a simple way to watch the domain (or a select OU) for GPOs changes and automatically take backups when policies are added, removed o…
This tutorial will walk an individual through the steps necessary to install and configure the Windows Server Backup Utility. Directly connect an external storage device such as a USB drive, or CD\DVD burner: If the device is a USB drive, ensure i…
This video shows how to use Hyena, from SystemTools Software, to update 100 user accounts from an external text file. View in 1080p for best video quality.
Suggested Courses
Course of the Month7 days, 21 hours left to enroll

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question