How to Set Up a Windows 2008 R2 SNTP / NTP Server

When configured correctly, you can use the Windows Time (W32Time) service as an SNTP/NTP server for both windows and non-windows SNTP/NTP clients.
  • Start “regedit”, and locate this key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\
and set the “AnnounceFlags” parameter value to “5”
  • To Enable the NTPServer, locate this key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer\
and set the “Enabled” parameter value to “1”
  • Exit the Registry Editor
  • Run the following commands to restart the Windows Time service:
net stop w32time
net start w32time

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