Data Domain: Resolve Azure Cloud Profile Authentication Error by Regenerating Storage Keys

概要: Regenerate Azure portal keys for the storage account/Uniform Resource Locator (URL) and authenticate Data Domain profile. Error: Server failed to authenticate the request – Authorization header signature. Caused by portal glitch with expired keys. ...

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現象

Observed Issues

  • Regenerate the keys on Azure portal for the blob storage account / URL.
  • Authentication error during Azure Cloud profile creation on Data Domain: Server failed to authenticate the request. Ensure the Authorization header is correctly formed, including the signature.

原因

Root Cause of Azure Cloud Profile Authentication Failure

The authentication issue originates from a malfunction within the Azure portal that affects the storage account keys used by Data Domain.

  • Azure portal generated keys for the blob storage account become invalid or are marked as expired.
  • The invalid/expired keys cause the Authorization header in the request to be formed incorrectly, leading to the error message: 
    Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature.
  • This behavior is identified as a glitch in the Azure portal; the exact internal trigger is unknown.

解決方法

Re‑authenticate Azure Cloud Profile on Data Domain

Prerequisites

  • Administrative access to the Azure portal.
  • Administrative access to the Data Domain system.
  • Current Azure storage account name and URL.
  • Maintenance window (optional) to avoid service disruption.

Resolution Steps

  • Regenerate storage account keys in Azure
    1. Log in to the Azure portal .
    2. Navigate to Storage accounts and select the affected account.
    3. In the left‑hand menu, choose Access keys under Security + networking .
    4. Click Regenerate for key1 (or key2 if preferred).
    5. Copy the newly generated key to a secure location.
  • Update the Cloud profile on Data Domain
    1. Log in to the Data Domain System Manager.
    2. Go to Cloud > Azure > Cloud Profiles .
    3. Select the profile that is failing authentication and click Edit .
    4. Replace the existing Access Key value with the new key copied from Azure.
    5. Confirm the Blob storage URL is correct (e.g., 
      https://.blob.core.windows.net/
      Save the changes.
  • Validate the connection
    1. From the Data Domain UI, select the updated Azure profile and click Test Connection .
    2. Ensure the status returns Connected without authentication errors.

Verification

  • Check the Cloud profile status page; it should display Connected and show the last successful sync timestamp.
  • Review the Data Domain system logs for any remaining “Server failed to authenticate the request” messages.
  • Confirm that data replication or backup jobs targeting Azure complete without errors.
Caution: Regenerating an access key invalidates the previous key for all services that use it. Update every application, script, or service that references the old key to prevent unexpected outages.
Warning: Performing the key regeneration during peak usage may cause temporary data transfer interruptions. Schedule the change during a low‑traffic window whenever possible.
Note: If you encounter persistent authentication failures after following these steps, contact Dell Support with the relevant service request number and include the Data Domain system logs for further analysis.

対象製品

Integrated System for Microsoft Azure Stack Hub

製品

Integrated System for Microsoft Azure Stack Hub, Data Domain
文書のプロパティ
文書番号: 000044429
文書の種類: Solution
最終更新: 21 1月 2026
バージョン:  4
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