ActiveImage Protector™ Cluster
Regardless whether physical machine or virtual environment, you need one license for one cluster environment configured with two nodes. 1 license is required to back up one clustered virtual machines on different hosts configured with 2 nodes. For a cluster environment configured with 3 or more nodes, please purchase the number of licenses required for the additional node plus the basic node license. When ESXi virtual environment is deployed on an HCI infrastructure, you are recommended to purchase Virtual Edition.