vSphere provides a centralized license management system that you can use to manage licenses for ESXi hosts, vCenter Server systems, vSAN clusters, Supervisor Clusters, and solutions. To leverage several cloud capabilities while you manage your on-premises vSphere infrastructure, you can convert your vCenter Servers and vSAN clusters to subscription.
For more information about how to get access to cloud services for your on-premises vSphere environments, see the VMware vSphere+ documentation.