IDM > Configuration > Company Management:
Company management allows an administrator to add/manage companies within the application. Each Identity (e.g. employees, contractors etc.) listed on the IDM tab must be assigned to a specific company. Companies can be partitioned within the application in a variety of different ways in order to restrict the data that can be viewed by users within each company (review the Partition Data by Company section for more detail).
It is not currently possible to delete a Company from the application once it has been added.