Instead of creating an organization for your PKI hierarchy, you can join an existing one. 

To join an organization

1. Open the following URL in a Web browser. 

   https://<machine>/management-console

   Where <machine> is the IP address or domain name of the machine hosting Cryptographic Security Platform.

2. Log in to the Management Console as one of the users created in Creating Certificate Authority tenants. 
3. In the content pane, click Manage Solution under Certificate Authority (CA).
   
4. Select Operations in the sidebar.
   
5. Click Onboard.
6. Click Join an Organization.
7. Enter the name of an existing organization in the Join Organization dialog.
8. Click Join.