You upgrade all vSphere Replication components of vCloud Availability for vCloud Director by using a pre-downloaded ISO image.
The downloadable ISO image is the only available method of upgrading the vCloud Availability for vCloud Director 1.0.X vSphere Replication components to version 2.0.
You cannot downgrade to an earlier version of vSphere Replication.
You must upgrade the vSphere Replication components of the vCloud Availability for vCloud Director solution in the following order.
Upgrade the vSphere Replication Cloud Service hosts.
Upgrade thevSphere Replication Manager instances.
Upgrade the vSphere Replication Server instances.