The time synchronization solution

in the windows domain is in the domain of the windows 2003 active directory architecture. When the client joins the domain. Then the domain controller is a time master, which is a time source of the client. In theory, the client will automatically synchronize time with the DC. But actually, when the client's time changes. It is not possible to automatically synchronize time with the domain controller. To achieve this. We also need to make some changes on the DC. If the DC is configured to not use an external time source, change the announcement flag on the DC. First enter regedit in Run to enter the Registry Editor. Modify as shown below.

Configure for DC is to use your own clock to provide a time source.
In order to enable the client in the domain to actively find the DC for time synchronization. So you need to configure Windows time on the DC default and policy. As shown

Thus, DC has become a veritable time master in a Windows domain. We detect the client and change the client's time. Then enter the command line interface:
net stop w32time
net start w32time
Then you will find out. The time you changed has changed back to normal time. Let's take a look at the system log. As shown below:

apparent. Client 192.168.5.30 and time source 192.168.5.1 (DC) are time synchronized through port 123 of ntp.
About the time synchronization of the windows domain is introduced here.