As an administrator:

# register the service
w32tm /register

# set your time servers to ntp1, ntp2, ntp3
w32tm /config /update /manualpeerlist:"ntp1.in.quay.net ntp2.in.quay.net ntp3.in.quay.net"

# resynchronize the service
w32tm /resync

# show your configuration
w32tm /query /peers

# what is my current time source
w32tm /query /source

# more stuff
w32tm /query /status
w32tm /query /configuration