Ntp/Windows time

Links: TimeSyncNTP , https://blog.foldersecurityviewer.com/how-to-configure-ntp-server-on-windows-server-2019/
NTP uses UDP port 123.

Enabeling ntp in windows registry

Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\w32time\TimeProviders\NtpServer" -Name "Enabled" -Value 1
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\services\W32Time\Config" -Name "AnnounceFlags" -Value 5 
Restart-Service w32Time

Other windows ntp/time commands

w32tm /query /configuration to check and shows the NTP server configuration.
w32tm /query /peers for checking the list of NTP servers configured alongside their configuration status
w32tm /resync /nowait to force-synchronize time with your NTP server.
w32tm /query /source to show the source of the time.
w32tm /query /status to reveal NTP time service status.

Looking at accuracy of time

w32tm /stripchart /computer:<server-name>