To back up a subclient with IntelliSnap, you must enable IntelliSnap and select a snapshot engine.
From the navigation pane, go to Protect > File servers.
The File servers page appears.
Click a file server.
The file server properties page appears.
Under Subclients, click a subclient.
The subclient properties page appears.
In the Snapshot section, enable the Enabled slider.
The Edit snapshot dialog box appears.
From the Engine name list, select a snapshot engine, and then click Save.