Setting up Windows 10/11 as an NTP Time Server

Instructions to setup a Windows 10 or 11 PC as a NTP time server :

• Using the Registry Editor change the following two keys

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\Config -> AnnounceFlags = 5

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\W32Time\TimeProviders\NtpServer -> Enabled = 1

• Create inbound firewall rule allowing UDP port 123
  
  
• From admin command prompt run sc triggerinfo w32time delete to clear any triggers which prevent the service from starting
  
  
• Ensure "Windows Time" service is set to Automatic 
  
  
• Restart "Windows Time" service