For those that still asking this question.

    To update, use the command below (2008 and 2012 server compatible)

    w32tm /config /manualpeerlist:"ntp_server" /syncfromflags:manual /reliable:yes /update

change the ntp_server with your source

    Restart the time service

    net stop w32time
    net start w32time

    Resync the time

    w32tm /resync

    Verify your sync status

    w32tm /query /status