Use the CA Certificates section of the Certificate Management page to add a supplemental CA certificate to the default CA list.
Note
The VX Series appliance has a CLI, but it does not have a Web UI. The recommended method for this configuration on a VX Series appliance is through the managing Central Management System appliance Web UI.
Click the Settings tab on all appliances except the HX Series. On the HX Series appliance select Appliance Settings from the Admin menu.
Click Certificates/Keys in the sidebar.
In the "CA Certificates" section of the page, click Add Root/Intermediate CA Certificate.

Click Choose File.
In the dialog box that opens, go to the certificate file in your local file system.
Click Commit.