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sbs 2008 clients time out-of-sync

We have an SBS 2008 server that is configured for an external time source.  it is taking the time correctly but the clients are out by 11 minutes.  

The servers are physical.
1 Solution
cmatchettAuthor Commented:
i have just noticed that the time on the server has reverted to using time.windows.com after me manually setting it to pool.ntp.org

I can't find a time setting in any of the group policies
Aaron TomoskyTechnology ConsultantCommented:
Server should pull from wherever external, clients should pull from server. Are they joined to the domain?
Cris HannaCommented:
Here's a great article by another SBS MVP on how to get time all sync'd up on SBS 2008
How to set an NTP time server in Windows 2008 (SBS 2008 and SBS 2011)

I don't know if this is a universal problem. but I have noticed a few of my clients and my own server all got ahead by about 10/15minutes the other day. I manually reset, but they are ahead again. So my guess is perhaps time.windows.com is out? I am now doing some googling to see if there is a real problem and will let you know what I find
SandeshdubeySenior Server EngineerCommented:
I will recommend to run rsop.msc on client computer as well as server and check are any GPO configured for W32time sync.Also check for any script deployed for the same or any third party software like dimention which can cause time sync issue.

You also need to ensure that authorative time server role is configured on PDC role holder server.

Configure authorative time server on the PDC role holder server below is the KB article for the same.http://support.microsoft.com/kb/816042

By default client computer will follow domain hierarcy for time sync.

Please also make sure that udp port 123 which as direction the chosen NTP server is not blocked.

For other domain computers / servers, make sure that they are using NT5DS for time sync. More here: http://support.microsoft.com/kb/223184
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