Correcting time source on a non-PDC-emulator DC

Question

Correcting time source on a non-PDC-emulator DC

asked

M.Hameed 11

Hi,
I've discovered a time difference On a DC running windows server 2019 that is not a PDC emulator. Checking its time source shows that it does not follow the domain hierarchy and depends on the local CMOS as follows:

w32tm /query /status
Leap Indicator: 3(not synchronized)
Stratum: 0 (unspecified)
Precision: -23 (119.209ns per tick)
Root Delay: 0.0000000s
Root Dispersion: 0.0000000s
ReferenceId: 0x00000000 (unspecified)
Last Successful Sync Time: unspecified
Source: Local CMOS Clock
Poll Interval: 6 (64s)

Then I tried to "reset" the time service using:
net stop w32time
w32tm /unregister
w32tm /register
net start w32time

w32tm /config /syncfromflags:domhier /update
net stop w32time
net start w32time

I found Two issues:

1- During stopping windows time service I get an error as follows:

net stop w32time
The Windows Time service is stopping.
A system error has occurred.

System error 23 has occurred.

Data error (cyclic redundancy check).

The Windows Time service was stopped successfully.

2- The time source is not changed to follow the domain hierarchy.

any ideas?

Answer 1

answered

Miguel Gonçalves 76

Hi,

Starting with basic;
Check if you have UDP port 123 open between ntp server and ntp clients
Try configure service manually "w32tm /config /manualpeerlist:[server],0x8 /syncfromflags:MANUAL /reliable:yes /update" -- > flag "0x8" force normal "client" request and not "symmetric active" requests, then w32tm /config /update.

Additional commands to trobleshoot (also look for IMPORTANT event viewer events
net time /querysntp
net stop w32time
w32tm /unregister
w32tm /register
W32tm /resync /rediscover
net start w32time

M.Hameed 11 Reputation points

2022-04-06T10:49:55.93+00:00

Thanks for the reply, @Miguel Gonçalves

I'm not trying to set an NTP as a time source for this machine. I just want to make it follow the normal hierarchy in the domain (supposed to be the PDC emulator). I don't want to set it manually as the holder of PDC emulator role may change at any time.
also, I need to fix error 23 that appears while stopping the time service.
Miguel Gonçalves 76 Reputation points

2022-04-06T12:17:30.537+00:00

When you "net stop w32time", did you receive another events in the event viewer?
M.Hameed 11 Reputation points

2022-04-07T06:54:58.663+00:00

No, no other events related to "System error 23" are logged.

Answer 2

answered

Dave Patrick 328.6K Microsoft MVP

Some general info

All domain members should use NT5DS domain time.
Desktops and member servers sync with any domain controller.
Domain controllers sync with PDC emulator (one per domain)
PDC emulator in child domain can sync with any domain controller in parent domain.
PDC emulator in parent domain syncs with either a hardware clock or possibly an external source.
https://blogs.technet.microsoft.com/nepapfe/2013/03/01/its-simple-time-configuration-in-active-directory/

For the problem member you can

w32tm /unregister
net stop w32time
w32tm /register
net start w32time
w32tm /config /syncfromflags:domhier /update
net stop w32time
net start w32time
then check
w32tm /query /source
w32tm /query /configuration

--please don't forget to upvote and Accept as answer if the reply is helpful--

Dave Patrick 328.6K Reputation points Microsoft MVP

2022-04-07T12:28:50.187+00:00

Just checking if there's any progress or updates?

--please don't forget to upvote and Accept as answer if the reply is helpful--
M.Hameed 11 Reputation points

2022-04-08T09:44:38.74+00:00

Unfortunately, not yet.
Dave Patrick 328.6K Reputation points Microsoft MVP

2022-04-08T12:56:54.85+00:00

Just a reminder, please don't forget to close up the thread by
Dave Patrick 328.6K Reputation points Microsoft MVP

2022-04-12T12:47:44.777+00:00

Just checking if there's any progress or updates?

--please don't forget to upvote and Accept as answer if the reply is helpful--

Correcting time source on a non-PDC-emulator DC

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