After you upgrade the vCenter Server that contains the vSphere Replication 5.8 virtual appliance, the vSphere Replication user interface is no longer visible in the vSphere Web Client.
Problem
If you upgrade a vSphere Replication appliance that runs in a vCenter Server 5.1.x, and later upgrade the vCenter Server to version 5.5, the user interface components that are related to vSphere Replication are no longer visible in the vSphere Web Client interface.
Cause
This problem occurs because after the upgrade of the vCenter Server instance, vSphere Replication needs to update its extension registration in vCenter Server.