I have worked on several Nutanix Cloud Manager (NCM) products, including Nutanix Prism, Nutanix CVMs, and Nutanix storage products. We had an on-premises infrastructure based on Nutanix hardware and the Nutanix hypervisor layer based on Acropolis.
Nutanix Cloud Manager (NCM) is a new offering from Nutanix, whereas our setup had a small on-premises presence with Nutanix-based hypervisor servers managed using Nutanix Prism. This cloud manager comes as an offering on top of Nutanix Prism, where we can manage multiple Nutanix-related hardware and components. We used to host VDIs based on Citrix on the Nutanix hardware. Now that we have reached end of life on the hardware and Citrix front, we have moved all of our on-premises infrastructure to Azure.