Tag Archives: NTP

Clock not syncing after upgrading in place to Windows 10 (1607)

This was a hard one to Google.  Turns out, upgrading in-place from Windows 8.1 to Windows 10 resets NTP settings to defaults per Microsoft.  Solution is to either unregister and re-register w32tm or create a GPO for NTP settings.

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Configuring NTP on Server 2012

From PowerShell:

w32tm /config /manualpeerlist:pool.ntp.org /syncfromflags:MANUAL
Stop-Service w32time ; Start-Service w32time

This sets the manual (as opposed to domain) NTP peer list to that on pool.ntp.org, specifies that the sync should be from the manual peer list, and restarts the w32time service. You should immediately notice the system clock being accurate. You can troubleshoot NTP by running:

w32tm /query /status
w32tm /query /peers
w32tm /query /configuration

You can force a resync by:

w32tm /resync

And per Microsoft, you can set w32tm to its default configuration by:

net stop w32time
w32tm /unregister
w32tm /register
net start w32time