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How to Setup an Authoritative Time Sync on all machines

Unanswered How to Setup an Authoritative Time Sync on all machines

  • Tuesday, February 12, 2013 5:30 PM
     
     
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    I have configured a windows 2K12 server as an authoritative time server with an external source and it is also PDC.  I have noticed that the other DC's do not automatically sync time unless I stop and start the time service.  How do I correct this? 

    Additionally over the years a few of the member servers were also pointed to external time servers.  I want to make ALL DC's, member servers and workstations (XP, vista and 7) sync automatically with the W2K12 machine. 

    I also have a number of VM's running W2K3, W2k8, W2K12, WXP, W7.   How do I make them all sync.  Keep in mind that some of the VM's are NOT members of the domain.

     

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  • Tuesday, February 12, 2013 6:47 PM
     
     
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    Hi, 

    Please have a look at this Technet guide and configure time source accordingly.

    Configuring a time source for the forest

    Regards, Ravikumar P

     
  • Tuesday, February 12, 2013 8:23 PM
     
     
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    Thank you for that but it only covers the DC's in the forest I believe.  How do you handle the member servers and workstations that have had their time settings set to external sources?  How do you make sure all of the VM's are also pointing in the right place?  How do you make sure that everyone is getting time from teh same source?
     
  • Tuesday, February 12, 2013 8:37 PM
     
     
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    Member servers & workstations are the part of domain it will get sync with PDC time unless and otherwise you change time in BIOS of member servers and workstations.

    Regards, Ravikumar P

     
  • Tuesday, February 12, 2013 9:08 PM
     
     
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    But I believe that some of the machines have been configured to sync EXTERNALLY - how do I reconfigure them back to looking at the PDC.  I have looked at the registry of some of the machines under w32time service and they have external DNS names for time sync.

    Please advise the registry settings for normal settings or a command that will reset everything to a domain pdc lookup.  Thanks.

     
  • Tuesday, February 26, 2013 9:30 AM
     
     
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    Hello,

    my blog contains all required commands to reset the machines to the domain time sync http://msmvps.com/blogs/mweber/archive/2010/06/27/time-configuration-in-a-windows-domain.aspx

    In short, on machine with problems run:

    w32tm /config /syncfromflags:domhier /update

    After that you have to run:
    net stop w32time
    net start w32time

    Best regards

    Meinolf Weber
    MVP, MCP, MCTS
    Microsoft MVP - Directory Services
    My Blog: http://msmvps.com/blogs/mweber/

    Disclaimer: This posting is provided AS IS with no warranties or guarantees and confers no rights.