Before you expand the vRealize Automation cluste with a third vRealize Automation virtual appliance, on the vRealize Automation virtual appliances and vRealize Automation IaaS components, you must install a certificate that includes the host name of the third appliance.

You add the third vRealize Automation virtual appliance as an additional subject alternative name (SAN) in the certificate. You must also update the trusted vRealize Automation certificate on the vRealize Business for Cloud and vRealize Operations Manager deployments in the environment.