With the release of Service Pack 2 for version 11 of the Commvault Simpana software, there is finally Intellisnap support for the Nutanix platform. You can read more about it in the release notes of Service Pack 2. I must add a note that the Intellisnap support Matrix is not updated yet, but that will be a matter of time.

For now it is waiting for official support of the Acropolis Hypervisor.

Edited: The intellisnap Matrix is already updated. Nutanix is on the list with Intellisnap support for VMware and Hyper-V