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Managed Identity with .NET¶

Managed Identity provides a secure way to authenticate your .NET application without managing connection strings.

1. Add Azure.Identity NuGet Package¶

dotnet add package Azure.Identity

2. Initialize Client with DefaultAzureCredential¶

Instead of a connection string, provide the resource endpoint and a DefaultAzureCredential instance.

using Azure.Identity;
using Azure.Communication.Sms;

string endpoint = "https://<your-resource-name>.communication.azure.com";

var smsClient = new SmsClient(
    new Uri(endpoint), 
    new DefaultAzureCredential());

// Use the client as usual
await smsClient.SendAsync(...);

3. Dependency Injection Integration¶

In an ASP.NET Core application, register the client in Program.cs.

using Microsoft.Extensions.Azure;

builder.Services.AddAzureClients(clientBuilder =>
{
    clientBuilder.AddSmsClient(new Uri(builder.Configuration["AcsEndpoint"]));
    clientBuilder.UseCredential(new DefaultAzureCredential());
});

4. RBAC Roles¶

Ensure your application's identity has the correct roles assigned:

Communication User: Access to identity and messaging.
Communication Service Contributor: Full management access.

Sources¶