To upgrade vSphere Replication, you must upgrade the required components in your vSphere environment in a specific sequence.
Before you upgrade the components on the recovery site, upgrade all the components on the protected site. If you have issues that prevent you from accessing the protected site during the upgrade, use the recovery site to restore the protected site to its original state. The ESXi host can be upgraded any time.
To upgrade vSphere Replication, see Upgrading vSphere Replication.