The schema is extensible, which means that you can change it. However, modifying the schema is dangerous because doing so affects the entire domain forest. Microsoft doesnít recommend schema modification.
If you insist on modifying the schema, you can use the GUI or edit the registry. To use the GUI, you must first register the .dll file for the Microsoft Management Console (MMC) snap-in. Go to a command prompt, and enter
Then, use the Microsoft Windows 2000 Resource Kitís Tools console to start the Schema Manager. Alternatively, create a custom MMC to start the Schema Manager. Next, add the Active Directory Schema snap-in to the Schema Manager. (From the Start menu, select Run, and enter
From the Console menu, select Add/Remove Snap-in. Click Add, and select Active Directory Schema. Finally, click Add, Close, OK.)
Another way to modify the schema is to edit the registry.