Query the time source being used.

w32tm /query /status

Set the list of time sources

w32tm /config /manualpeerlist:<Time Source> /syncfromflags:MANUAL

update to use the new time source

w32tm /config /update

Query difference to time source.

w32tm /stripchart /computer:<Time Source> /samples:5 /dataonly
w32tm /stripchart /computer:chronos.csr.net /samples:5 /dataonly

Resync with the time source.

w32tm /resync