| Event Information | According to Microsoft :
Cause :
This event is logged when the time service has stopped advertising as a time source because the local machine is not an Active Directory Domain Controller.
Resolution :
Ensure that the computer is a domain controller
To resolve this issue:- Ensure that the computer reporting Event ID 140 is a domain controller.
- Ensure that the Netlogon service running on the computer that is reporting the event shows that the computer is a domain controller.
- If the computer is not a domain controller, restart the Netlogon service on that computer.
Perform all of the following procedures on the computer that is reporting Event 140.
To perform these procedures, you must have membership in Domain Admins, or you must have been delegated the appropriate authority.
Ensure that the computer reporting this event is a domain controller
To ensure that the computer is a domain controller:- Open Server Manager. To open Server Manager, click Start. In Start Search, type Server Manager, and then press ENTER. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
- In the Programs list, click Server Manager.
- In the console tree, double-click Roles.
- A list of roles that are assigned to the server appears in the details pane. Ensure that Active Directory Domain Services is listed. If this role does not appear, determine whether this computer should be a domain controller. If the computer should be a domain controller, consider restoring the computer from backup or installing Active Directory Domain Services (AD DS).
Ensure that the Netlogon service is reporting the computer as a domain controller
To ensure that the Netlogon service is reporting the computer as a domain controller:- Open a command prompt as an administrator. To open a command prompt as an administrator, click Start. In Start Search, type Command Prompt. At the top of the Start menu, right-click Command Prompt, and then click Run as administrator. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
- Type nltest /dclist:domainname, and then press ENTER. Substitute the actual name of the domain for domainname in the command.
- Ensure that the output from the command lists the name of the computer reporting Event 140. If not, restart the Netlogon service.
Restart the Netlogon service
To restart the Netlogon service:- Open a command prompt as an administrator.
- Type net stop netlogon & net start netlogon, and then press ENTER.
- Try the nltest /dclist:domainname command again.
- If the computer still does not appear in the list of domain controllers, type dcdiag, and then press ENTER to further troubleshoot the issue with this domain controller.
Verify :
When the Windows Time service is advertising time as a time source, Event ID 139, "The time service has started advertising as a time source," is logged in Event Viewer. |