How to configure Windows Time Server to use an external time source on a Windows 2003/2008

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How to configure Windows Time Server to use an external time source on a Windows 2003/2008

To Windows Time Server to use an external time source on a Windows 2003/2008, please follow these steps:

1.	Change the server type to NTP. To do this, follow these steps: a. Click Start, click Run, type regedit, and then click OK. b. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\Type c. In the right pane, right-click Type, and then click Modify. d. In Edit Value, type NTP in the Value data box, and then click OK.
2.	Set AnnounceFlags to 5. To do this, follow these steps: a. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\AnnounceFlags b. In the right pane, right-click AnnounceFlags, and then click Modify. c. In Edit DWORD Value, type 5 in the Value data box, and then click OK.
3.	Enable NTPServer. To do this, follow these steps: a. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpServer b. In the right pane, right-click Enabled, and then click Modify. c. In Edit DWORD Value, type 1 in the Value data box, and then click OK.
4.	Specify the time sources. To do this, follow these steps: a. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Parameters\NtpServer b. In the right pane, right-click NtpServer, and then click Modify. c. In Edit Value, type Peers in the Value data box, for example time.windows.com, and then click OK. Note: each DNS must be unique and you must append 0x1 to the end of each DNS name otherwise changes will not take effect
5.	Select the poll interval. To do this, follow these steps: a. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient\SpecialPollInterval b. In the right pane, right-click SpecialPollInterval, and then click Modify. c. In Edit DWORD Value, type TimeInSeconds in the Value data box, for example 3600 Decimal (60 minutes) and then clickOK.
6.	Configure the time correction settings. To do this, follow these steps: a. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\MaxPosPhaseCorrection b. In the right pane, right-click MaxPosPhaseCorrection, and then click Modify. c. In Edit DWORD Value, click to select Decimal in the Base box. d. In Edit DWORD Value, type TimeInSeconds in the Value data box, for example 3600 (1 hour) and then click OK. e. Locate and then click the following registry subkey:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\Config\MaxNegPhaseCorrection f. In the right pane, right-click MaxNegPhaseCorrection, and then click Modify. g. In Edit DWORD Value, click to select Decimal in the Base box. h. In Edit DWORD Value, type TimeInSeconds in the Value data box, for example, 3600 (1 hour) and then click OK.
7.	Quit Registry Editor.
8.	At the command prompt, type the following command to restart the Windows Time service, and then press ENTER: net stop w32time && net start w32time

Note: to test it, execute this command: net time /querysntp

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