# Entra App Registration

Guides Microsoft Entra ID app registration, OAuth 2.0 authentication, and MSAL...

- Repository: https://github.com/microsoft/azure-skills (1609 stars)
- Category: Security
- License: MIT
- Last updated: 2026-10-30
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add microsoft/azure-skills --skill entra-app-registration -g -a claude-code -y`
Codex: `npx skills add microsoft/azure-skills --skill entra-app-registration -g -a codex -y`
Cursor: `npx skills add microsoft/azure-skills --skill entra-app-registration -g -a cursor -y`
Gemini CLI: `npx skills add microsoft/azure-skills --skill entra-app-registration -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add microsoft/azure-skills`

## Description

Guides Microsoft Entra ID app registration, OAuth 2.0 authentication, and MSAL integration. USE FOR: create app registration, register Azure AD app, configure OAuth, set up authentication, add API permissions, generate service principal, MSAL example, console app auth, Entra ID setup, Azure AD authentication. DO NOT USE FOR: Key Vault secrets (use azure-keyvault-expiration-audit), general Azure resource security guidance.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

## Overview

Microsoft Entra ID (formerly Azure Active Directory) is Microsoft's cloud-based identity and access management service. App registrations allow applications to authenticate users and access Azure resources securely.

### Key Concepts

| Concept | Description |
|---------|-------------|
| **App Registration** | Configuration that allows an app to use Microsoft identity platform |
| **Application (Client) ID** | Unique identifier for your application |
| **Tenant ID** | Unique identifier for your Azure AD tenant/directory |
| **Client Secret** | Password for the application (confidential clients only) |
| **Redirect URI** | URL where authentication responses are sent |
| **API Permissions** | Access scopes your app requests |
| **Service Principal** | Identity created in your tenant when you register an app |

### Application Types

| Type | Use Case |
|------|----------|
| **Web Application** | Server-side apps, APIs |
| **Single Page App (SPA)** | JavaScript/React/Angular apps |
| **Mobile/Native App** | Desktop, mobile apps |
| **Daemon/Service** | Background services, APIs |

## Core Workflow

### Step 1: Register the Application

Create an app registration in the Azure portal or using Azure CLI.

**Portal Method:**
1. Navigate to Azure Portal → Microsoft Entra ID → App registrations
2. Click "New registration"
3. Provide name, supported account types, and redirect URI
4. Click "Register"

**CLI Method:** See [references/cli-commands.md](references/cli-commands.md)
**IaC Method:** See [references/BICEP-EXAMPLE.bicep](references/BICEP-EXAMPLE.bicep)

It's highly recommended to use the IaC to manage Entra app registration if you already use IaC in your project, need a scalable solution for managing lots of app registrations or need fine-grained audit history of the configuration changes. 

### Step 2: Configure Authentication

Set up authentication settings based on your application type.

The rest: https://github.com/microsoft/azure-skills/blob/HEAD/.github/plugins/azure-skills/skills/entra-app-registration/SKILL.md