Need to delete an immutable backup vault which is not used

Jeff Powell 0 Reputation points
2025-12-03T20:46:02.61+00:00

We have a backup service vault (Name), which we are not using. The service which was being backed up no longer exists. Since we no longer need this Azure backup vault, we would like to delete it. However, since the vault is marked immutable (or something similar to that) we are unable to delete it. Any helpful suggestions?

Azure Backup
Azure Backup
An Azure backup service that provides built-in management at scale.
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  1. Q&A Assist
    2025-12-03T20:46:09.3233333+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    To delete an immutable Azure Backup vault, you need to first disable the immutability feature. This typically involves the following steps:

    1. Disable Soft Delete: If the soft delete feature is enabled on the vault, you will need to disable it. You can do this by going to Properties -> Security Settings in the vault and disabling the Soft Delete feature.
    2. Remove Protected Items: Ensure that all backup items and protected data sources associated with the vault are deleted. You can do this by navigating to Backup Instances in the vault and deleting any listed items.
    3. Check for Dependencies: Make sure there are no dependencies such as registered storage accounts or private endpoints. Unregister any storage accounts and remove any private endpoints if they exist.
    4. Delete the Vault: Once all dependencies are cleared, you can proceed to delete the vault from the Azure portal by selecting Delete on the vault dashboard and confirming the deletion.

    If you encounter issues during this process, ensure that you have the necessary permissions and that all items are indeed removed before attempting to delete the vault again.


    References:

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  2. Suchitra Suregaunkar 4,210 Reputation points Microsoft External Staff Moderator
    2025-12-10T11:03:49.32+00:00

    Hello Jeff Powell

    By looking into the screenshot of your backup policy. Since your Recovery Services vault is in Immutable – Locked state, this is the root cause of why you cannot delete the backup item or the vault.

    When a vault is marked as Locked Immutable, Azure enforces WORM(Write‑Once‑Read‑Many) retention.

    This means:

    • Backup data cannot be deleted manually
    • Retention cannot be reduced
    • Soft delete cannot bypass immutability
    • Support cannot force-delete or override it
    • The vault cannot be deleted while any immutable recovery point still exists

    So you will see the exact error message: “The backup item(s) cannot be deleted since it has active recovery points and the selected Vault is an immutable vault.”

    Based on your backup policy:

    • Daily retention: 30 days
    • Weekly retention: 24 weeks
    • Monthly retention: 36 months (3 years)
    • Yearly retention: 10 years

    Azure always uses the longest applicable retention for the final backup. In your case, this is the Yearly retention = 10 years.

    The vault can only be deleted 10 years after the last yearly recovery point was created.

    This is by design, am also sharing you the Microsoft official supporting document for the more details.

    Reference: https://v4.hkg1.meaqua.org/en-us/azure/backup/backup-azure-immutable-vault-concept?tabs=recovery-services-vault#making-immutability-irreversible

    Screenshot:

    User's image

    If you have any other queries, please do let us know.

    Thanks,

    Suchitra.


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