If you only wish to update, create, deactivate, or reactivate a few or a single user's information, you can do so in the Admin module via:
Admin > User Management > Departments and users > Users > Individual Update
A user must have a first name, last name, and email address in order to be created. We strongly suggest using an employee ID as well, but if your organization does not use them that's fine.
For information on bulk updating, click here.