Disable Backup and Remove a VM from an Existing Recovery Service Vault
Azure VMs may only be assigned one Recovery Services Vault (RSV) at a time for native Azure VM backups. To allow Nerdio Manager to manage these backups for you, any existing Azure backup policies for the dedicated session host VMs must stopped and then deleted.
To disable the backup and remove a VM from an existing RSV:
In Nerdio Manager, navigate to AVD > Host Pools.
Locate the host pool you wish to work with and select Manage Hosts.
Locate the host you wish to work with and select the host's name. The Azure portal launches.
In the Azure portal, select the VM.
On the blade on the left side, in the Operations section, select Backup.
If backups are enabled, you are presented with the details pane. The recovery services vault can be seen here:
By default, Recovery Services Vaults have the "soft delete" feature enabled. This prevents backup data from being "Fully" deleted (purged) from Azure for 14 days, and causes an error when attempting to disassociate the VM from the RSV since there are still resources (the backup data) linked with the VM and RSV. You must temporarily disable soft-delete in order to do this before the 14 day period. Please refer to this Microsoft article for details.