Another NTP Sync to PDC problem

Question

Hello guys,

Sorry to open yet another problem about syncing such a basic thing as time, but i haven't been able to fix my problem despite the dozens articles i've read here and there :

I've got about 50 W10/W11 desktops in an AD environment. My WS 2022 PDC is sync'd with an external NTP source, and another WS 2022 server is sucessfully sync'd with this PDC (as well as some other UNIX machines).

But my Windows machines are not able to sync their clocks.

stripchart is working successfully :

w32tm /stripchart /computer:pdc.contoso.com /dataonly

Suivi de pdc.contoso.com [10.34.151.40:123].

L’heure actuelle est 13/01/2025 11:37:40.

11:37:40, +00.0031300s

11:37:42, +00.0031106s

11:37:44, +00.0028814s

11:37:46, +00.0030113s

11:37:48, +00.0028794s

I've also tried a non-Windows NTP client, which is also working fine, so it's not a firewall or a network problem.

w32tm logs haven't been useful :

154875 11:15:57.0354496s - W32TmServiceMain: timeout

154875 11:15:57.0355131s - Sample Prepared at 133812405570355046 for peer pdc.contoso.com (ntp.d|0.0.0.0:123->10.34.151.40:123)

154875 11:15:57.0355402s - ** NTP sample vector is empty.

154875 11:15:57.0355616s - No new NTP sample is available.

154875 11:15:57.0355901s - UpdateTimerQueue1: TN:41383590000::: LRT:273120000 LUT:263120000 LAFLTNS:41110470000 TSLGT:41208856240 LTNS:500000000000

154875 11:15:57.0356117s - W32TmServiceMain: waiting 1024.000s

154875 11:15:57.0356376s - Triggering re-read of configuration

154875 11:15:57.0356832s - W32TmServiceMain: Param change notification

154875 11:15:57.0359819s - ReadConfig: Found provider 'NtpClient':

154875 11:15:57.0361227s - ReadConfig: 'InputProvider'=0x00000001

154875 11:15:57.0361706s - ReadConfig: 'MetaDataProvider'=0x00000000

154875 11:15:57.0362210s - ReadConfig: 'DllName'='C:\WINDOWS\system32\w32time.dll'

154875 11:15:57.0362501s - ReadConfig: 'DllName'='C:\WINDOWS\system32\w32time.dll'

154875 11:15:57.0362714s - ReadConfig: 'DllName'='C:\WINDOWS\system32\w32time.dll'

154875 11:15:57.0363150s - ReadConfig: Found provider 'NtpServer':

154875 11:15:57.0363952s - ReadConfig: 'InputProvider'=0x00000000

154875 11:15:57.0364350s - ReadConfig: 'MetaDataProvider'=0x00000000

154875 11:15:57.0364836s - ReadConfig: 'DllName'='C:\WINDOWS\system32\w32time.dll'

154875 11:15:57.0365119s - ReadConfig: 'DllName'='C:\WINDOWS\system32\w32time.dll'

154875 11:15:57.0365304s - ReadConfig: 'DllName'='C:\WINDOWS\system32\w32time.dll'

154875 11:15:57.0365878s - ReadConfig: Found provider 'VMICTimeProvider':

154875 11:15:57.0366841s - ReadConfig: 'InputProvider'=0x00000001

154875 11:15:57.0367298s - ReadConfig: 'MetaDataProvider'=0x00000000

154875 11:15:57.0367772s - ReadConfig: 'DllName'='C:\WINDOWS\System32\vmictimeprovider.dll'

154875 11:15:57.0368057s - ReadConfig: 'DllName'='C:\WINDOWS\System32\vmictimeprovider.dll'

154875 11:15:57.0368271s - ReadConfig: 'DllName'='C:\WINDOWS\System32\vmictimeprovider.dll'

154875 11:15:57.0369317s - ReadConfig (policy): Found provider 'NtpClient':

154875 11:15:57.0370101s - ReadConfig (policy): 'Enabled'=0x00000001

154875 11:15:57.0370643s - ReadConfig (policy): Found provider 'NtpServer':

154875 11:15:57.0371340s - ReadConfig (policy): 'Enabled'=0x00000000

154875 11:15:57.0373607s - ReadConfig: 'PhaseCorrectRate'=0x00000001 (2)

154875 11:15:57.0374080s - ReadConfig: 'UpdateInterval'=0x00007530 (2)

154875 11:15:57.0374536s - ReadConfig: 'FrequencyCorrectRate'=0x00000004 (2)

154875 11:15:57.0374996s - ReadConfig: 'PollAdjustFactor'=0x00000005 (2)

154875 11:15:57.0375445s - ReadConfig: 'LargePhaseOffset'=0x02FAF080 (2)

154875 11:15:57.0375906s - ReadConfig: 'SpikeWatchPeriod'=0x00000384 (2)

154875 11:15:57.0376383s - ReadConfig: 'HoldPeriod'=0x00000005 (2)

154875 11:15:57.0376833s - ReadConfig: 'MinPollInterval'=0x0000000A (2)

154875 11:15:57.0377294s - ReadConfig: 'MaxPollInterval'=0x0000000F (2)

154875 11:15:57.0377741s - ReadConfig: 'ClockHoldoverPeriod'=0x0000C350 (2)

154875 11:15:57.0378191s - ReadConfig: 'AnnounceFlags'=0x0000000A (2)

154875 11:15:57.0378643s - ReadConfig: 'LocalClockDispersion'=0x0000000A (2)

154875 11:15:57.0379313s - ReadConfig: 'MaxNegPhaseCorrection'=0xFFFFFFFF (2)

154875 11:15:57.0379780s - ReadConfig: 'MaxPosPhaseCorrection'=0xFFFFFFFF (2)

154875 11:15:57.0380228s - ReadConfig: 'EventLogFlags'=0x00000002 (2)

154875 11:15:57.0380692s - ReadConfig: 'MaxAllowedPhaseOffset'=0x0000012C (2)

154875 11:15:57.0381279s - ReadConfig: 'UtilizeSslTimeData'=0x00000001 (2)

154875 11:15:57.0381791s - ReadConfig: 'ClockAdjustmentAuditLimit'=0x00000320 (2)

154875 11:15:57.0382244s - ReadConfig: 'TimeJumpAuditOffset'=0x00007080 (2)

154875 11:15:57.0382703s - ReadConfig: 'RpcInitFailureAction'=0x00000000 (1)

154875 11:15:57.0383026s - Clock adjustment info: dwCurrentSecPerTick: 156250 dwDefaultSecPerTick: 156250 bSyncToCmosDisabled:1

154875 11:15:57.0383236s - PerfFreq:10000000c/s

154875 11:15:57.0383521s - currAdj:10000000 Incr:10000000 IncrEnabled:1 CRCS:113.333 CRCI:66.6667

154875 11:15:57.0385583s - Product Type:1

154875 11:15:57.0385998s - No params changed for local clock.

154875 11:15:57.0386210s - /--TimeProvider: new enabled provider list

154875 11:15:57.0386423s - | Name:NtpClient, Started:0, Input:1, Marked:0, RefCount:0, DllName:C:\WINDOWS\system32\w32time.dll

154875 11:15:57.0386627s - >--

154875 11:15:57.0386823s - | Total:1, Input: 1, Marked: 0

154875 11:15:57.0387009s - \--

154875 11:15:57.0387199s - /--TimeProvider: Parameter change before list is updated

154875 11:15:57.0387410s - | Name:NtpClient, Started:1, Input:1, Marked:0, RefCount:0, DllName:C:\WINDOWS\system32\w32time.dll

154875 11:15:57.0387602s - >--

154875 11:15:57.0387795s - | Total:1, Input: 1, Marked: 0

154875 11:15:57.0387983s - \--

154875 11:15:57.0388178s - /--TimeProvider: new disabled provider list

154875 11:15:57.0388386s - | Name:NtpServer, Started:0, Input:0, Marked:0, RefCount:0, DllName:C:\WINDOWS\system32\w32time.dll

154875 11:15:57.0388593s - | Name:VMICTimeProvider, Started:0, Input:1, Marked:0, RefCount:0, DllName:C:\WINDOWS\System32\vmictimeprovider.dll

154875 11:15:57.0388795s - >--

154875 11:15:57.0388988s - | Total:2, Input: 1, Marked: 0

154875 11:15:57.0389176s - \--

154875 11:15:57.0389392s - /--TimeProvider: Parameter change before list is updated

154875 11:15:57.0389598s - | Name:NtpServer, Started:0, Input:0, Marked:0, RefCount:0, DllName:C:\WINDOWS\system32\w32time.dll

154875 11:15:57.0389887s - | Name:VMICTimeProvider, Started:0, Input:1, Marked:0, RefCount:0, DllName:C:\WINDOWS\System32\vmictimeprovider.dll

154875 11:15:57.0390120s - >--

154875 11:15:57.0390316s - | Total:2, Input: 1, Marked: 0

154875 11:15:57.0390504s - \--

154875 11:15:57.0390728s - TimeProvCommand([NtpClient], TPC_UpdateConfig) called.

154875 11:15:57.0393581s - ReadConfig: 'AllowNonstandardModeCombinations'=0x00000001 (2)

154875 11:15:57.0394165s - ReadConfig: 'CompatibilityFlags'=0x80000000 (2)

154875 11:15:57.0394726s - ReadConfig: 'SpecialPollInterval'=0x00000E10 (2)

154875 11:15:57.0395291s - ReadConfig: 'ResolvePeerBackoffMinutes'=0x0000000F (2)

154875 11:15:57.0395889s - ReadConfig: 'ResolvePeerBackoffMaxTimes'=0x00000007 (2)

154875 11:15:57.0396449s - ReadConfig: 'EventLogFlags'=0x00000001 (2)

154875 11:15:57.0397007s - ReadConfig: 'LargeSampleSkew'=0x00000003 (2)

154875 11:15:57.0397623s - ReadConfig: 'SignatureAuthAllowed'=0x00000001 (2)

154875 11:15:57.0398090s - ReadConfig: 'Type'=NT5DS (2)

154875 11:15:57.0398653s - ReadConfig: 'CrossSiteSyncFlags'=0x00000002 (2)

154875 11:15:57.0399958s - StartListeningThread completed!

154875 11:15:57.0400261s - PeerPollingThread: waiting 853.836s

154875 11:15:57.0400602s - StartPeerPollingThread completed!

154875 11:15:57.0400836s - Provider list: 0 stopped, 0 started, 1 not changed.

154875 11:15:57.0401037s - /--TimeProvider: Parameter change after list is updated

154875 11:15:57.0401247s - | Name:NtpClient, Started:1, Input:1, Marked:0, RefCount:0, DllName:C:\WINDOWS\system32\w32time.dll

154875 11:15:57.0401439s - >--

154875 11:15:57.0401640s - | Total:1, Input: 1, Marked: 0

154875 11:15:57.0401828s - \--

154875 11:15:57.0402039s - RPC Call - Query Configuration

154875 11:15:57.0402611s - RPC Call - Query Provider Configuration

154875 11:15:57.0402855s - TimeProvCommand([NtpClient], TPC_Query) called.

154875 11:15:57.0403095s - RPC Call - Query Provider Configuration

154875 11:15:57.0403317s - RPC Call - Query Provider Configuration

154875 11:15:57.0404354s - UpdateTimerQueue1: TN:41383590000::: LRT:273120000 LUT:263120000 LAFLTNS:41110470000 TSLGT:41208856980 LTNS:500000000000

154875 11:15:57.0404622s - W32TmServiceMain: waiting 1023.999s

154875 11:20:13.0666918s - Queued APM resume notification

154875 11:20:13.0669201s - W32TmServiceMain: APM resume.

154875 11:20:13.0669513s - Network Topology Change (RPC or immediate)

154875 11:20:13.0669793s - TimeProvCommand([NtpClient], TPC_NetTopoChange) called.

154875 11:20:13.0670125s - NtpProvider: Network Topology Change

154875 11:20:13.0672790s - Reachability: removing peer pdc.contoso.com (ntp.d|0.0.0.0:123->10.34.151.40:123). LAST PEER IN GROUP!

154875 11:20:13.0673987s - Peers reset: p-p:0 a-p:1 a-x:0

154875 11:20:13.0676981s - Iftmstmps allowed.

154875 11:20:13.0679533s - Iftmstmps allowed.

154875 11:20:13.0684366s - NtpProvider: Created 2 sockets (0 listen-only): [::]:123<0x0>, 0.0.0.0:123<0x0>

154875 11:20:13.0685232s - StartListeningThread completed!

154875 11:20:13.0686760s - PeerPollingThread: waiting 597.807s

154875 11:20:13.0687080s - StartPeerPollingThread completed!

154875 11:20:13.0690203s - UpdateTimerQueue1: TN:43943750000::: LRT:43943750000 LUT:263120000 LAFLTNS:0 TSLGT:43769121677 LTNS:500000000000

154875 11:20:13.0690491s - W32TmServiceMain: waiting 767.973s

PCT: 279557 154875 11:20:13.0691852s - ClockDispln TimeSlip:TimeSlip LastUTC:281241 SetUnsync: LI:3 S:0 RDl:0 RDs:0 TSF:0x0

154875 11:20:13.0692571s - TimeProvCommand([NtpClient], TPC_TimeJumped) called.

154875 11:20:13.0692928s - Setting Netlogon Service bits: 0x0

154875 11:20:13.0723034s - PeerPollingThread: PeerListUpdated

154875 11:20:13.0744983s - W32TmServiceMain: APM resume complete successfully!

154875 11:20:13.0747782s - PeerPollingThread: PeerListUpdated

154875 11:20:13.0747326s - Resolving domain peer

154875 11:20:13.0748301s - PeerPollingThread: waiting forever

154875 11:20:13.3026143s - Domain member syncing from \\pdc.contoso.com.

154875 11:20:13.3036559s - Create new peer associations: #1

154875 11:20:13.3037050s - Association: (Local) 0.0.0.0:123 => 10.34.151.40:123 (Remote)

154875 11:20:13.3037442s - Created reachability group: (

154875 11:20:13.3037716s - 10.34.151.40:123,

154875 11:20:13.3037937s - )

154875 11:20:13.3038283s - PollIntervalChange(): clear: host 0 = max 17

154875 11:20:13.3038677s - PeerPollingThread: waiting 0.000s

154875 11:20:13.3039946s - PeerPollingThread: PeerListUpdated

154875 11:20:13.3040576s - Reachability: Attempting to contact peer pdc.contoso.com (ntp.d|0.0.0.0:123->10.34.151.40:123).

154875 11:20:13.3040854s - Polling peer pdc.contoso.com (ntp.d|0.0.0.0:123->10.34.151.40:123)

154875 11:20:13.3041096s - Sending packet to pdc.contoso.com (ntp.d|0.0.0.0:123->10.34.151.40:123) in Win2K detect mode, stage 1.

154875 11:20:13.3044746s - PollIntervalChange(pdc.contoso.com (ntp.d|0.0.0.0:123->10.34.151.40:123)): reclamp: 17 -> 10 (min=4, max=17, sys=10)

154875 11:20:13.3045097s - Peer poll: Max:1024.0000000s Cur:00.0000000s

154875 11:20:13.3183757s - Tx timestamp not returned and may be unsupported on the current network interface.

154875 11:20:13.3184446s - PeerPollingThread: waiting 1024.000s

154875 11:20:13.3494273s - PowerNotificationCallback: Data:1 SuspendState:0

154875 11:20:13.3494701s - PowerNotificationCallback: Entering suspend state

154875 11:20:13.3494847s - W32Time: Processing APM suspend notification

I'm guessing some Windows setting is responsible, but i haven't been able to find which one.

If anyone can help, i'd be really grateful.