Resources are the databases, application instances, Availability Groups, and similar components that are maintained by the plug-ins you have installed. You can add those resources to resource groups so that you can perform data protection jobs, but first you must identify which resources you have available. Determining available resources also verifies that the plug-in installation has completed successfully.
Data Protection Guide for VMs, Datastores, and VMDKs using the SnapCenter Plug-in for VMware vSphere
You cannot back up databases when the Overall Status option in the Details page is set to Not available for backup. The Overall Status option is set to Not available for backup when any of the following is true:
Databases are not in normal state when they are offline, restoring, recovery pending, suspect, and so on.
For example, if a user has only view access to the database, files and properties of the database cannot be identified and hence cannot be backed up.
You cannot perform data protection operations on a database that is on a non NetApp storage.
After the SnapCenter administrator assigns the resources to a RBAC user, the RBAC user must log in and click Refresh Resources to see the latest Overall Status of the resources.