Note This functionality is not available in the Standard edition of the backup software.
Most actions that are a part of a backup plan, such as replication, validation, and applying retention rules, are performed by the agent that performs the backup. This puts additional workload on the machine where the agent is running, even after the backup process is complete.
Separating the replication, validation, cleanup, and conversion plans from backup plans gives you the flexibility:
If you are using a storage node, installing a dedicated agent on the same machine makes sense.
Unlike the backup and VM replication plans, which employ the time settings of machines running the agents, the off-host data processing plans run according to the time settings of the management server machine.