Windows time server not in sync with other devices

Computer Gladiator 441 Reputation points
2021-06-24T23:28:47.99+00:00

Our management team is frustrated with the server time and all other time devices in the office because they are not all synchronized. Windows Time server seems to be 5-7 minutes ahead than cell providers for example. Is there a way to sync with these providers? Appreciate any advice.

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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  1. Dave Patrick 426.1K Reputation points MVP
    2021-06-26T13:39:29.143+00:00

    By default a virtual machine gets time from hypervisor via integration services. Sounds like you'll want to turn off (uncheck) Time synchronization in integration services. If the host were Hyper-V you can do that here.
    109565-image.png

    --please don't forget to upvote and Accept as answer if the reply is helpful--


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  1. Dave Patrick 426.1K Reputation points MVP
    2021-06-25T00:04:14.583+00:00

    Some general info

    On the PDCe

    some to choose from
    https://tf.nist.gov/tf-cgi/servers.cgi

    w32tm /unregister
    net stop w32time
    w32tm /register
    net start w32time
    w32tm /config /manualpeerlist:<ntp ip address> /syncfromflags:manual /reliable:yes /update
    net stop w32time
    net start w32time
    then check
    w32tm /query /source
    w32tm /query /configuration

    --please don't forget to upvote and Accept as answer if the reply is helpful--

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  2. Vicky Wang 2,646 Reputation points
    2021-06-25T09:48:44.867+00:00

    In our environment (which has been reliable thus far), I configure all Domain Controllers to synchronize their time with an external source.

    I use the w32tm command, you have to run it twice, one to set the config, and one to commit the change.

    At a command prompt:

    1. First, modify the config; You are telling the windows time service here to sync from a manual peer list, and that the server specified is reliable. In my case I use pool.ntp.org - this is a pool of free NTP servers on the internet.

    w32tm /config /syncfromflags:MANUAL /manualpeerlist:pool.ntp.org /reliable:YES

    Then run a second command to notify the windows time service that the config has changed and to commit it.

    w32tm /config /update

    Once this is done on all domain controllers, their time will be "synchronized" to the same time source (and an accurate one at that). By default, all member servers and computers look to the closest domain controller for their time updates. This should keep ALL your PCs up to date. You can also point other devices (routers, switches, WAPs, etc) to your domain controllers as an NTP source.

    Hope this information can help you

    Best wishes

    Vicky

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  3. Computer Gladiator 441 Reputation points
    2021-06-26T13:36:16.643+00:00

    Hi, I ran a /query /source command and it shows VM IC Time Synchronization Provider. I have a Domain controller on a VM and a second DC as a stand alone. I don't understand the significance of this provider. Should this be removed? Thanks

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  4. Vicky Wang 2,646 Reputation points
    2021-06-28T08:00:27.453+00:00

    Hi,

    Welcome to share your current situation if there are any updates.

    Please feel free to let us know if you need further assistance.

    Best Regards,
    Vicky

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