Cannot Delete Orphaned Instant Clones

On rare occasions, during provisioning, an instant clone gets into an error state and you cannot delete the desktop pool from Horizon Administrator.

Problem

To delete the pool, Horizon 7 sends requests to vCenter Server to power off the clones. However, the requests fail for clones that are orphaned. The result is that Horizon 7 cannot delete the pool.

Solution

1. From vCenter Server, unregister the orphaned clones.
2. From Horizon Administrator, delete the clones.