Note: this documentation is pending approval and should not be considered a best practice yet.
Sometimes there will be multiple department listings with the same or similar name for your department. This usually happens for administrative reasons and can be confusing end users of the Directory system. For example, you might search for "Department X" and multiple "Department X" listings will be shown, each with their own org number. Further more, this might be confusing because some employees might be listed under one listing for "Department X" while others might be listed under another listing for "Department X". It is usually desirable to have all employees of "Department X" listed under one listing.
So, how do you fix this? It is relatively easy to fix, but you will need access to SAP in order to make the necessary changes. If you do not have this level of access, you will need to contact your department's HR representative.
First, you will need to select a primary "Department X". Next, in SAP, you will need to add a courtesy/unpaid appointment in the primary department for all employees that are not already listed under the primary department and add the "NL" (not-listed) flag to their non-primary appointment.
Once all employees and appointments within an org unit are hidden, the department will be automatically 'suppressed' and will not appear while searching the Directory. Note that in order for a department to be 'suppressed', it must also not have any child departments with non-hidden appointments. This process happens every night, so you might not see the change right away.