In a clustered configuration there are a few basics to keep in mind. If you target a node it will license the node. If you target the cluster it will license the cluster. It all comes down to how you task your jobs!
Example 1
I am running a job in an environment where i have multiple sources. Where my source cluster is "\CorpClusterData" and source server is "\CorpServer1d1" my destination is "\CorpServer2d1."
How many licenses will I need?
This configuration will need 3 licenses, one for the cluster "CorpCluster" one for the file server "CorpServer1" one for "CorpServer2".
Note: When using multiple sources, one being the cluster and one being a file server (node) in the cluster they will be treated like any other file server.
Example 2
I am running a job in an environment where my cluster name is "CorpCluster." My Source path is "\CorpClusterAccounting" and my Target path is "\CorpServer2BackupsAccounting." How many licenses will I need? This configuration will need 2 licenses, one for the cluster "CorpCluster" and one for the file server "CorpServer2."
Example 3
I am running a job in an environment where my cluster name is "CorpCluster". My Source path is "\CorpClusterData2011" and my Target path is "\CorpClusterYearly_Data_Archives2011." How many licenses will I need? This configuration will need 1 license, for the cluster "CorpCluster".
Note 1: In a clustered environment, data is typically copied to one server in the cluster, so only one destination license is required. This configuration requires 2 licenses, one for the source server and one for the destination node.
Note 2: The cluster host machine will not require a license unless the host machine is referenced in the copy job.
Note 3: in order to treat the whole cluster as a licensed server; ensure to copy only to and from CLUSTER resources.