KB2709: Backing up Hyper-V guest cluster based on VHD set
www.veeam.com › kb2709Aug 22, 2018 · Error code: '32770'. Active-active access is not supported for the shared VHDX in VM group. This issue occurs because the VHDS disk is used as a Cluster Shared Volume (CSV), which cannot be used for creating checkpoints. To fix this issue, you need to use each disk as a shared disk instead of a Cluster Shared Volume.