Synchronize Windows Server 2008 (R2) PDC time with external NTP server

PDC need to synchronize to reliable external time source and other member need to synchronize to this PDC only.

For PDC
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\AnnounceFlags
DWORD Value, type 5

net stop w32time

w32tm /config /syncfromflags:manual /manualpeerlist:"0.pool.ntp.org,0x1 1.pool.ntp.org,0x1 2.pool.ntp.org,0x1”  /reliable:yes /update

w32tm /resync /rediscover

net start w32time

you can check result from:
- Event Viewer
- w32tm /stripchart /computer:id.pool.ntp.org /samples:2 /dataonly
  error: 0x800705B4 means timeout or no access to NTP server
- w32tm /query /configuration    and look for NTP server value
- HKLM\System\CurrentControlSet\services\W32Time\Parameters NTPServer value

to reset back to default
net stop w32time
w32tm /unregister
w32tm /register
net start w32time


For other DC
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\AnnounceFlags

DWORD Value, type A

net stop w32time

w32tm /config /syncfromflags:DOMHIER /update

w32tm /resync /nowait /rediscover

net start w32time