With vSphere Replication, configuring failback for a virtual machine is a manual process. The following process will guide you through the steps required to perform a failback:
Recover the virtual machine to the recovery site. Refer to the Recovering virtual machines section for instructions.
Remove the virtual machine from the inventory at the protected site.
Configure an outgoing replication from the recovery site to the protected site. Refer to the Configuring Replication for a VM to the local/remote site section for instructions.
When configuring the replication from the recovery to the protected site, if the datastore at the protected site has the VM files, then those can be used as seeds; otherwise an initial full sync is performed.