Use Departments to reflect the structure of your company.
Your companies name is shown by default, click on it and select the +Add button above to add departments. You also have the option to Edit or Remove them.
To add more subunits click on the main departments to which you want to add subunits and select +Add. This way you can create several departments with teams and further subdivisions.
To assign a department to a certain user go to the Users tab and assign it in bulk or individually:
1. assign it in bulk: choose users by ticking the box beside their names and select Action above and choose Assign to department
2. assign it individually: click on the user, go to his Time&Attendance tab, click in the window below the department's section and choose a preferred department
To avoid overriding previous membership in a certain department set a membership start date.