When clicking on the Add Organisation action under the domain or an organisation node you are presented with the Create a new Organisation dialog which adds a sub-organisation under the selected node.
Enter the Name and Description then Create Organisation to generate.
When clicking on the Edit Organisation action you are presented with the Edit Organisation dialog.
Amend the Name and Description information and enter Update to apply.
If you wish to remove an organisation select Delete Organisation and click OK in the returned dialog to complete.
Please be aware that an organisation cannot be deleted where it has any associated child organisations or users.
Once deletion is confirmed this action cannot be undone or the organisation retrieved.
This operation is not available for the root organisation.