Microsoft Authentication Library (MSAL) for Python

1.35.1 · active · verified Wed Oct 04

The Microsoft Authentication Library (MSAL) for Python enables your app to access the Microsoft Cloud by supporting authentication with Microsoft Azure Active Directory (AAD) and Microsoft Accounts (MSA) using OAuth2 and OpenID Connect. Current version is 1.35.1, with regular updates addressing bugs and feature enhancements.

Warnings

breaking Support for the Resource Owner Password Credentials (ROPC) flow is deprecated.
Fix: Update your authentication flow to use authorization code flow or other supported options.
gotcha Ensure environment variable names are correctly set (case-sensitive).
Fix: Always use uppercase letters for environment variables.

Install

pip install msal Install MSAL

Imports

ConfidentialClientApplication
```
from msal import ConfidentialClientApplication
```
Always use the correct module to prevent import errors.

Quickstart

This example demonstrates how to acquire an access token for Azure AD.

import os
from msal import ConfidentialClientApplication

client_id = os.environ.get('AZURE_CLIENT_ID', '')
client_secret = os.environ.get('AZURE_CLIENT_SECRET', '')
authority = 'https://login.microsoftonline.com/your_tenant_id'
app = ConfidentialClientApplication(client_id, authority=authority, client_credential=client_secret)
token_response = app.acquire_token_for_client(scopes=['https://graph.microsoft.com/.default'])
print(token_response)

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