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Create a User Delegation SAS Using Azure CLI

By using a user delegation SAS, we can help to improve the security of access to an Azure Blob storage container. Unlike a normal shared access signature (SAS), a user delegation SAS is associated with an Azure Active Directory (AAD) identity. A user delegation SAS is a service SAS that only supports Blob storage. In this lab, you will create a user delegation SAS using Azure CLI. We'll then be able to use this user delegation SAS to access a blob. After completing this lab, you'll understand how to create and revoke a user delegation SAS using Azure CLI. **Scenario** As you walk through the lab, consider the following scenario: You work as an Azure Security Engineer for The Pupper Camp (TPC). TPC is a dog services company with offices across the globe. Microsoft recommends using a user delegation SAS when possible, so your manager has asked you to test the functionality of a user delegation SAS and demonstrate how to create and revoke access to a blob object in an Azure storage account. This is part of a proof of concept that TPC is developing, which will eventually be configured using an Entra ID Service Principal.

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 1h 0m
Last updated
Clock icon Sep 03, 2025

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Table of Contents

  1. Challenge

    Upload a File to Blob Storage

    1. Use the Azure Portal to upload a small file to the container1 container in the storage account to Blob storage.

  2. Challenge

    Create a User Delegation SAS

    1. Use Azure Cloud Shell to create a Bash shell.

      • Subscription: Default
      • Cloud Shell region: same as your lab provided storage account
      • Resource group: Use existing
      • Storage account: Use existing
      • File share: Create new and enter in cloudshell.

    2. Once in the shell, create a user delegation SAS.

  3. Challenge

    Revoke a User Delegation SAS

    1. Revoke all user delegation keys associated with the storage account:

      Note: To verify that the user delegation SAS no longer works, you may need to wait up to 5 minutes and then try using the link generated earlier. It should no longer work, and you will see an "AuthenticationFailed" message.

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