In the Backup Intelligence desktop application, you can remove old backup jobs to reduce space in your storage quota.
Click the Restore button in the left-hand menu bar
Select the Storage Vault containing the backed-up data, and click Next
Identify the Protected Item snapshot that you want to remove from the Storage Vault, expanding the selection as necessary
Right click the Protected Item snapshot, and select "Delete this snapshot"
Backup Intelligence will remove the snapshot from the Storage Vault, and then immediately clean up unused data within the Storage Vault to save on disk space.