Testing a NTP Server from Windows

You can test NTP from within a Windows command prompt using the utility w32tm

w32tm /stripchart /computer:192.168.x.x /dataonly

Example of a working NTP server query:

w32tm /stripchart /computer:192.168.x.x /dataonly
Tracking 192.168.x.x [192.168.x.x:123].
The current time is 12/08/2021 14:57:44.
14:57:44, +03.8630391s
14:57:46, +03.8583498s
14:57:48, +03.8599084s

Example of a not working NTP server query:

w32tm /stripchart /computer:192.168.x.x /dataonly
Tracking 192.168.x.x [192.168.x.x:123].
The current time is 12/08/2021 15:02:53.
15:02:53, error: 0x800705B4
15:02:56, error: 0x800705B4