Overview of Microsoft Entra ID for blobs

When a security principal (a user, group, or application) attempts to access a blob resource, the request must be authorized, unless it's a blob available for anonymous access. With Microsoft Entra ID, access to a resource is a two-step process:

  1. First, the security principal's identity is authenticated and an OAuth 2.0 token is returned.
  • The authentication step requires that an application request an OAuth 2.0 access token at runtime. If an application is running from within an Azure entity such as an Azure VM, a virtual machine scale set, or an Azure Functions app, it can use a managed identity to access blob data.
  1. Next, the token is passed as part of a request to the Blob service and used by the service to authorize access to the specified resource.
  • Next, the token is passed as part of a request to the Blob service and used by the service to authorize access to the specified resource.

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