After you upgrade to SnapCenter 3.x or later, you must migrate the VSC backups that you created in vCenter to SnapCenter. If you are a vCenter admin who seldom uses the SnapCenter GUI, you might want to perform the VSC host migration from the SnapCenter VMware vSphere web client GUI.
If your environment has one SnapCenter Server that is registered with two or more VSC hosts, you must migrate each VSC host separately. If your vCenter is in Linked Mode or Enhanced Linked Mode, you must migrate each host separately.
After you upgrade SnapCenter Server to 3.x or later, all vSphere hosts in the SnapCenter GUI are listed with the status "Plug-in incompatible" until you migrate each VSC host to SnapCenter Plug-in for VMware vSphere.
After the migration, you can perform your VM and datastore backup and restore operations using the SnapCenter VMware vSphere web client GUI on vCenter, which allows you access to SnapCenter features.
After you migrate a VSC host to the Plug-in for VMware vSphere, if you want to perform VM management tasks other than backup and restore then you must upgrade to VSC 7.0 or later. See the VSC documentation for details.