How can I make sure that schema has been correctly extended?

Explanation:  For a detailed check, you need to take a schema dump using ICE and compare the schema with the schema files provided in the vpn\system\schema directory.

See support.novell.com and search for schcmp* for a schema comparison tool or the TID 2931699.

Action:  Open ConsoleOne Schema Manager, and verify that the following object classes exist: