58237: Acronis Backup Cloud / Acronis Backup Service: Backup Fails with "Key not valid for use in specified state"

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Symptoms

  1. You create a backup plan and set up encryption.
  2. After a while, you change the user running Acronis Managed Machine Service on the protected machine.
  3. Backup fails with:

| Error
| Backup failed

| Key not valid for use in specified state
| Error code: 65520
| Module: 0
| LineInfo: 0x36E942E8021F4B85
| Fields: {"$module":"security_core_vsa64_2406","code":"2148073483"}
| Message: Key not valid for use in specified state

Cause

Current security design permits read/write operations with backups exclusively to the encryption key owner. This means that subsequent backups have to be executed by the user that set the encryption key.

Solution

Run Acronis Managed Machine Service under the user that created the backup plan and set encryption: Start -> Search -> services.msc -> locate Acronis Managed Machine Service and change the user on the Log on as tab.

Alternatively, you can uninstall Acronis Backup Agent (turn on the Full data cleanup check-box while uninstalling) and install it under a new user.

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