Azure App Service: Unable to Access Azure Blob Storage with Managed Identity in .NET Core 3.1
I tried several approaches but none seem to work... I'm writing unit tests and I'm updating my dependencies and I'm writing unit tests and I'm currently developing an application hosted on Azure App Service that needs to access Azure Blob Storage using Managed Identity for authentication... I have set up the Managed Identity in the Azure portal and granted the necessary permissions to the Blob Storage account. However, when I try to access the blob storage, I keep encountering a `UnauthorizedAccessException` with the message: `The remote server returned an error: (403) Forbidden.` Here is the code snippet I'm using to access the Blob Storage: ```csharp using Azure.Storage.Blobs; using Azure.Identity; public class BlobStorageService { private readonly BlobServiceClient _blobServiceClient; public BlobStorageService() { // Using DefaultAzureCredential to access Blob Storage _blobServiceClient = new BlobServiceClient(new Uri("https://<your-storage-account-name>.blob.core.windows.net/"), new DefaultAzureCredential()); } public async Task<string> GetBlobContentAsync(string containerName, string blobName) { var containerClient = _blobServiceClient.GetBlobContainerClient(containerName); var blobClient = containerClient.GetBlobClient(blobName); var response = await blobClient.DownloadAsync(); using (var reader = new StreamReader(response.Value.Content)) { return await reader.ReadToEndAsync(); } } } ``` I have verified that the Managed Identity is enabled for the App Service, and I have assigned the `Storage Blob Data Reader` role to the Managed Identity in the Azure portal for the Blob Storage account. I also made sure that the connection string is not being used and that I'm relying solely on the Managed Identity. Despite this setup, I still encounter the 403 Forbidden error. I've checked that the Blob Storage endpoint is correctly formatted, and I've tried both with and without the trailing slash in the URI. Is there something I'm missing in the configuration or any additional permissions required for the Managed Identity? Any help would be greatly appreciated! The project is a microservice built with C#. I'm open to any suggestions. Any help would be greatly appreciated! For context: I'm using C# on Windows 11.