Hello Omar.
Please consider the CA Service Management 14.1 WIKI Pages for further details on this.
From the landing page: https://docops.ca.com/ca-service-management/14-1/en
Enter the text 'Business Unit' (without the quotes) in the search field and check the pages as shown in the corresponding result.
Most likely this will get you further on this subject.
Thanks and kind regards, Louis avn Amelsfort.