User Defined Fields can be added to all users for multiple purposes. You may include a user's employee number, office location, or any other pertinent information to identify someone.
To Add User Defined Fields:
1) In Preferences, select Add Fields to User Profiles.
2) Create a Label and a Field Type (Check or Text Box).
3) Click Add.
4) You can also edit user defined fields in the Preferences menu in Edit User Defined Fields.