First, locate your PDC Server. Open the command prompt and type: [questo in realtà non funziona troppo]
netdom /query fsm
Log in to your PDC Server and open the command prompt.
Stop the W32Time service:
net stop w32time
Configure the external time sources, type:
w32tm /config /syncfromflags:manual /manualpeerlist:"0.debian.pool.ntp.org, 1.debian.pool.ntp.org, 3.it.pool.ntp.org,
...
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