Hi Garth,
Direct integration with SnapMirror and AltaVault is only available as part of the Data Fabric Solution for Cloud Backup, which includes SnapCenter, and not Intellisnap for NetApp at this time. There are features that are specific to AltaVault that are implemented with ONTAP, and only SnapCenter is aware of that today.
You can use Intellisnap for NetApp to create backup copy policies to AltaVault today, but not with the feature capabilities of AltaVault and SnapCenter, including cataloging snapshots. As I understand from TR-4457, the ability to catalog snapshots is disabled when creating the storage backup copy policy and copy policy.
Regards,
Christopher