An attempt to back up a virtual machine fails with the following error messages:
Failed to back up virtual machine 'name'
Failed to prepare for backing up
There is no license required to perform the operation with 'name' (either FEATURE_ABR_VIRTUAL_AGENT_ESX or FEATURE_ABR_VIRTUAL_AGENT_HV)
You need to assign a license to the Acronis Agent to be able to back up a virtual machine.
Make sure you have an Acronis Backup Advanced for VMware/Hyper-V (Acronis Backup & Recovery Virtual Edition) license. See also Acronis Backup: Product Comparison. In a cluster environment, all cluster nodes should be licensed.
Once you have the correct license, assign it:
Please contact Acronis Support if you need assistance.