Active Directory Schema Extensions
The Active Directory data exists in a distributed database of Attributes and Classes. An example of a Active Directory Class is the User class. Some example Attributes of the user class might be the user’s first name, last name, phone number, and so on. Define every Attribute or Class that is added to an existing Active Directory schema with a unique ID. To maintain unique IDs throughout the industry, Microsoft maintains a database of Active Directory Object Identifiers (OIDs).
The Active Directory schema defines the rules for what data can be included in the database. To extend the schema in Active Directory, install the latest received unique OIDs, unique name extensions, and unique linked attribute IDs for the new attributes and classes in the directory service from the Systems Management Tools and Documentation DVD.
Dell extension is: dell
Dell base OID is: 1.2.840.113556.1.8000.1280
Dell LinkID range is:12070 to 12079