For LDAP services, an organizational unit can include a number of groups and usually represents a division, department, or other discrete entity. A DN can exist in more than one organizational unit.
New organizational units are created using the organizationalUnit object class.
The distinguished name for new organizational units is of the form:
ou=new organization,ou=parent organization,...,o=base organization,c=country
Access the Administration Server and click the Users and Groups tab.
Click the Create Organizational Unit link.
Enter the information and click Create.
For more information about specific fields, see the online help.
For example, if you create a new organization called Accounting within the organizational unit West Coast, and your base DN is o=Ace Industry,c=US, then the new organization unit’s DN is:
ou=Accounting,ou=West Coast,o=Ace Industry,c=US