You can display the certificate PEM for the selected appliance in the Editing Appliance Configuration: <hostname>, SSL page.

Choose Manage > Topology: Appliances to display the Appliances page. Select the name of the appliance you want to edit to expand the page and display the Appliance tabs, and then select the Appliance Pages tab to display the Appliance Configuration Pages list.

Under Appliance Configuration Pages, click SSL to display the Editing Appliance Configuration: <hostname>, SSL page. Select the Display Certificate PEM tab to display the certificate in PEM format.