PC time sync - Source AD?

Cobra25
Cobra25 used Ask the Experts™
on
Hello, we have w7/w10 pc's and we are having issues with time sync. We changed our PDC to use NTP.

Now on a W7 workstation, i did a w32tm /query /source, and it came back with NTD5S, is that right ??

:\windows\system32>w32tm /query /configuration
[Configuration]

EventLogFlags: 2 (Local)
AnnounceFlags: 10 (Local)
TimeJumpAuditOffset: 28800 (Local)
MinPollInterval: 10 (Local)
MaxPollInterval: 15 (Local)
MaxNegPhaseCorrection: 4294967295 (Local)
MaxPosPhaseCorrection: 4294967295 (Local)
MaxAllowedPhaseOffset: 300 (Local)

FrequencyCorrectRate: 4 (Local)
PollAdjustFactor: 5 (Local)
LargePhaseOffset: 50000000 (Local)
SpikeWatchPeriod: 900 (Local)
LocalClockDispersion: 10 (Local)
HoldPeriod: 5 (Local)
PhaseCorrectRate: 1 (Local)
UpdateInterval: 30000 (Local)


[TimeProviders]

NtpClient (Local)
DllName: C:\windows\system32\w32time.dll (Local)
Enabled: 1 (Local)
InputProvider: 1 (Local)
CrossSiteSyncFlags: 2 (Local)
AllowNonstandardModeCombinations: 1 (Local)
ResolvePeerBackoffMinutes: 15 (Local)
ResolvePeerBackoffMaxTimes: 7 (Local)
CompatibilityFlags: 2147483648 (Local)
EventLogFlags: 1 (Local)
LargeSampleSkew: 3 (Local)
SpecialPollInterval: 3600 (Local)
Type: NT5DS (Local)

VMICTimeProvider (Local)
DllName: C:\windows\System32\vmictimeprovider.dll (Local)
Enabled: 1 (Local)
InputProvider: 1 (Local)
NtpServer (Local)
DllName: C:\windows\system32\w32time.dll (Local)
Enabled: 0 (Local)
InputProvider: 0 (Local)
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Distinguished Expert 2018
Commented:
That's usually what you want, yes.  That is the default domain heirarchy method for time sources and is architected to be resilient and minimize replay possibility attacks.
That looks fine.

Another  useful command is W32TM /stripchart /computer:{DCname}

This will verify that the local machine is synchronised to the DC, and display any skew.
Pete LongTechnical Consultant

Commented:
Looks OK to me, here's my usual run though

Windows – Setting Domain Time
Pete

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