The VMware Horizon administrator is unable to configure View Storage Accelerator on a vSphere 6 desktop virtual machine. What could be the reason?
A. The virtual machine is on a VSAN datastore.
B. You cannot use View Storage Accelerator in a vSphere 5.5 or later environments.
C. Global Policies has been edited and the Multimedia redirection (MMR) value has been set to Allow.
D. The virtual machine is larger than 512GB.
To use View Storage Accelerator in a vSphere 5.5 or later environment, a desktop virtual machine must be 512GB or smaller.
View Storage Accelerator is disabled on virtual machines that are larger than 512GB.
Virtual machine size is defined by the total VMDK capacity. For example, one VMDK file might be 512GB or a set of VMDK files might total 512GB. This requirement also applies to virtual machines that were created in an earlier vSphere release and upgraded to vSphere 5.5.
D I think
https://docs.vmware.com/en/VMware-Horizon-7/7.1/rn/horizon-71-view-release-notes.html
Look under Compatibility Notes