With vSphere Replication you can replicate virtual machines from a source site to a target site.
You can set a recovery point objective (RPO) to a certain time interval depending on your data protection needs. vSphere Replication applies all changes made to virtual machines configured for replication at the source site to their replicas at the target site. This process reoccurs periodically to ensure that the replicas at the target site are not older than the RPO interval that you set. See How the Recovery Point Objective Affects Replication Scheduling.
To replicate a virtual machine using vSphere Replication, you must deploy the vSphere Replication appliance at the source and target sites. A vSphere Replication infrastructure requires one vSphere Replication appliance at each site.
The source and target sites must be connected for you to be able to configure replications. You cannot perform replications if one of the sites is in the Connection issue state. See Site Connection States Displayed in the vSphere Web Client. If the sites appear in the Not authenticated state, scheduled replications continue as normal, but you cannot manage replications. See vSphere Replication Sites Appear in the Not Authenticated State.
vSphere Replication does not support the recovery of multiple virtual machines from the same workflow. Each recovery workflow is for an individual virtual machine.
You can configure replications for powered-off virtual machines, but the data synchronization begins when the virtual machine is powered on. While the source virtual machine is powered off, the replication appears in Not active status.
You cannot use vSphere Replication to replicate virtual machine templates.