A VM that Veeam processed is found to require consolidation, yet consolidation attempts fail.
A VM that Veeam processed is found to have an orphaned snapshot.
This may occur Virtual Appliance Mode (HOTADD) is used to back up a VM, and is caused by:
Before beginning ensure that all jobs have stopped. This way the only disks that will be found attached to proxies will be the proxy's own disks and ones that need to be removed.
Review the settings of each Veeam Proxy looking for any disks which match the following:
Once you have found a disk HOTADDed to a proxy which needs to be released perform the following steps to release it.