The schema of an Active Directory is the definition of all objects in that instance of Active Directory. The schema of Austin Active Directory consists of the default attributes and classes for Active Directory Domain Services and Microsoft Exchange as well as the custom utexasAuxClass and the associated attributes.

The following are the object classes most commonly leveraged by end-users and department IT staff:

• user class - objects that represent user accounts that are either EID-based accounts created with information from the EID system or department accounts created via the Department User Tools
• group classs - objects that represent groups of objects such as distribute lists and security groups; groups are created via Office 365 Management Tools, the Department Group Tools, or directly by department IT staff
• computer objects - devices connected to Active Directory and can be optionally managed via Group Policy
• organizationalUnit objects - containers for objects; organizational units are used to define a structure inside Active Directory

The classes above have been extended with the utexasAuxClass class. This class enables the Austin Active Directory to store more information on objects than is permitted by default schema. The Active Directory team manages the assignment of attributes in the utexasAuxClass and assigns attributes on a per-object basis. The attributes these classes are defined in the attribute maps detailed below: