You are currently using the legacy vSphere Replication, which will be deprecated in the next release. Transition over to the Enhanced vSphere Replication

Products

• VMware Live Recovery

Issue/Introduction

Recovery UI showing the information banner 'You are currently using the legacy vSphere Replication, which will be deprecated in the next release. Transition over to the Enhanced vSphere Replication.'

Environment

vSphere Replication 9.0.x

Resolution

This is an informational message. At present you have VMs configured through a  pre9.0.x vSphere Replication Appliance.
No immediate action required at this time.

Additional Information

With vSphere 8.0U2 or later, vSphere Replication 9.0.x can reconfigure existing legacy replications as enhanced replications. 
Enhanced vSphere Replication
How do I reconfigure existing replications to use vSphere Replication with enhanced replication capabilities