Problem Description:
During File-Level Restore (FLR) operations on an Azure VM:
Only the boot area is visible; the main data drives are not accessible.
Backups may fail with the PHOENIX75 error.
Cause
The affected Azure VM has Azure Disk Encryption (ADE) enabled.
FLR is not supported for ADE-enabled disks due to encryption constraints.
Encryption prevents file-level access, so the FLR restore view does not show the full disk layout.
This limitation is consistent across Druva and other backup solutions due to Azure’s security model.
Traceback / Logs
FLR for non-boot (data) disks is not possible after enabling ADE.
Access to boot disks may also be restricted depending on encryption and permissions.
PHOENIX75 error: Indicates an attempt to create a disk with a name that already exists in the target resource group.
Backend and product teams confirmed this is a known limitation.
Resolution
File-Level Recovery Needs:
ADE should not be enabled on disks that require FLR.
ADE-Enabled Workloads:
Restores are possible at the full VM or disk level, though additional permissions may be required.