Unidesk reported back the following error on a single Desktop
“The CachePoint Appliance could not create the boot image. Error is: Failed to detach disks from the desktop and reattach to the CachePoint Appliance; export the logs and notify Technical Support that this error occurred.”
vSphere had put a lock on the Snapshot for this desktop.
After removing the Snapshots and forcing a rebuild from the Unidesk console, the Desktop Booting as normal