Time service commands

Config a manual time source

w32tm /config /manualpeerlist:peers /syncfromflags:manual /update 

Replace "peers" with a list of time servers, delimited by space, enclosed with double quotes.
Ignore KBs that maually set registry entries
Config a manual time source as the top time source in forest

w32tm /config /manualpeerlist:peers /syncfromflags:manual /reliable:yes /update

Detect time difference

w32tm /stripchart /computer:TimeServerName /samples:n /dataonly

Set server to use domain hierarchy

w32tm /config /syncfromflags:domhier /update

After change time settings, it's normally required to restart time service

If there is time difference, it takes time for the  system to bring the difference down depending on how much correct can be made in one step. The change is gradual.