Maintain Organizational Units: Initial Screen 
Use
To create an organizational unit (OU), specify the following data on the initial screen:
Specify the institution for which you want to create the OU.
If you are working with internal number assignment, leave the Organizational Unit field blank. The system automatically assigns an identification key when you save the data.
If you are working with external number assignment, enter the required identification key in the Organizational Unit field.
Specify the category of the organizational unit to be created in the OU Category field. The organizational unit categories available depend on the specified institution.
If you want to use an existing organizational unit as a template when creating your OU, specify the identification key of the existing organizational unit in the Organizational Unit field in the Template group box. This organizational unit must be of the specified category.
If you want to change or display organizational units, you simply have to specify the identification key of the OU concerned. If you do not know the identification key, you select it from the value help.