Active Directory - Windows Server 2012 R2

Question

Hi,
I want to update the NTP time source on my Domain Controllers as we're updating our NTP appliances. The commands I've seen to do this are:

w32tm.exe /config /syncfromflags:manual /manualpeerlist:10.1.1.1,0x8 10.1.1.2,0x8 /reliable:yes /update

The question I have is what does the 0x8 do? Is it needed?

From reading below, I still don't know the difference between setting 0x8, 0x1 or something else.

https://learn.microsoft.com/en-us/services-hub/health/remediation-steps-ad/configure-the-root-pdc-with-an-authoritative-time-source-and-avoid-widespread-time-skew
https://jackstromberg.com/2013/10/configuring-external-time-source-on-your-primary-domain-controller/
https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/time-synchronization-not-succeed-non-ntp

Please advise
Thanks

Answer 1

Hi,

0x8 definition is as below:

The 0x8 setting that is referenced in the command in the "Resolution" section sets Windows Time to use client mode.

The valid settings for the mode used with the /manualpeerlist switch include:

0x01 - use special poll interval SpecialInterval
0x02 - UseAsFallbackOnly
0x04 - send request as SymmetricActive mode
0x08 - send request as Client mode

time-synchronization-not-succeed-non-ntp

Hope this helps.
JS

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Answer 2

Thanks Jimmy,
The bit I was missing was understanding the context, in essence if you're syncing with a non Windows NTP server, then use 0x8 for client mode?