The VMware Certificate Authority (VMCA) is the default root certificate authority introduced in vSphere 6.0 that supplies the certificates to ensure secure communication over SSL between vCenter Server components and ESXi nodes in the virtualized infrastructure.

What is a VMCA name?

VMCA name, that is, the fully qualified domain name of the machine on which the certificate configuration is running.

What is vCenter certificate?

VMCA provides all the certificates for vCenter Server and ESXi hosts. ... You replace the Platform Services Controller and vCenter Server Appliance SSL certificates, and allow VMCA to manage certificates for solution users and ESXi hosts.