Check and Enable Changed Block Tracking

 Trouble

In order to use Block Level Incremental Backup (BLIB) in your backup policies for Virtual machines, you must check if the Change Block Tracking is enabled on each VM.

Workaround

Use this PowerCli script:

Get-VM | Get-View | Sort Name | Select Name, @{N="ChangeTrackingStatus";E={$_.Config.ChangeTrackingEnabled}}