NTP Syncronization to Microsoft DC

Hi, all,
I want to sync time for CUCM 6.0(1) by NTP from windows Domain Controller, which in turn runs NNTP service.
That's why I've configured DC's IP address (A.B.C.D) in CUCM OS
Administration interface, which says 'The NTP service is accessible' after that.
Then I've checked ntp status & config; it show the following:
admin:utils ntp config
This node is configured to synchronize with one of the following NTP server(s):
A.B.C.D
admin:utils ntp status
ntpd (pid 18410) is running...
remote refid st t when poll reach delay offset jitter
==============================================================================
127.127.1.0 127.127.1.0 10 l 17 64 1 0.000 0.000 0.008
A.B.C.D .LOCL. 1 u 12 64 1 0.355 -96181. 0.008
unsynchronised
time server re-starting
polling server every 16 s
Current time in UTC is : Tue Jun 3 11:58:07 UTC 2008
Current time in Europe/Moscow is : Tue Jun 3 15:58:07 MSD 2008
admin:
As a result IP Phones get theirs time from previously configured static time in CUCM.
I've entered it before going to NTP. But eventually due to NTP status is unsynchronised
IP Phones continue to use statically configured time in CUCM.
How can this be resolved ? Any ideas ?

Hi,
All depends on how important your time sync is.
My personal preference is always hardware over software.
Your most important point is to get an authorative time source.. Probably the 2 easiest options...
1. NTP server on the internet, either from your ISP, or sometimes from a local university. Google for free NTP servers in your location.
2. Buy a hardware clock / time source.. you can most likely point routers, switches, ccm, servers all directly to these servers. Same thing goolge for some product options.
Start here for Cisco NTP info..
http://www.cisco.com/en/US/tech/tk648/tk362/tk461/tsd_technology_support_sub-protocol_home.html
Not sure what version of windows you are running.. but try this for W2k3 server
http://support.microsoft.com/kb/816042
Cheers,
Tim

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        <Execution ProcessID="256" ThreadID="2056" />
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        NTP: +0.0000000s offset from DC1.domain.local
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        NTP: -110.4925481s offset from DC1.domain.local
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            Stratum: 0
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            RefID: DC1.domain.local [192.168.1.1]
            Stratum: 2
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        NTP: -0.0011524s offset from DC1.domain.local
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