Set the PDC emulator master in this forest to synchronize time with a reliable external time source. If you have not configured ...

Set the PDC emulator master in this forest to synchronize time with a reliable external time source. If you have not configured a reliable time server (GTIMESERV) in the forest root domain, set the PDC emulator master in this forest to synchronize time with a hardware clock that is installed on the network (the recommended approach). You can also set the PDC emulator master in this forest to synchronize time with an external time server by running the w32tm /config /computer:{1} /manualpeerlist:time.windows.com /syncfromflags:manual /update command. If you have configured a reliable time server (GTIMESERV) in the forest root domain, set the PDC emulator master in this forest to synchronize time from the forest root domain hierarchy by running w32tm /config /computer:{1} /syncfromflags:domhier /update.