I have seen this document/
The document contains requirements:
Update the existing appliance with all Microsoft Windows updates and Symantec updates and hot fixes before you begin the upgrade process.
Ensure that appliance hot fix TECH215884 is applied before attempting to start the upgrade. Without this hot fix, the upgrade cannot be initiated.
To verify the hot fix was successfully applied, start the Backup Exec Appliance web UI, log in, and then click Manage > Installed updates.
Scroll to the bottom and verify that TECH215884 is listed under Appliance updates.
Can I upgrade Backup Exec Appliance without first setting?
