Internet Time Feature Is Not Available When a Computer Is a Domain Member

On a Windows XP-based computer, the Internet Time tab does not appear in the Date and Time tool in Control Panel.

This behavior occurs because the Windows XP-based computer is a member of a domain. The Internet Time feature is only available in workgroup environments.

To resolve this behavior, synchronize the computer's time with time sources that are available in its domain.

This behavior is by design.

With the Internet Time feature, you can update the clock on your computer by synchronizing with a time server on the Internet.