Azure Auth - Microsoft Entra ID for React + Cloudflare Workers Package Versions : @azure/[email protected], @azure/[email protected], [email protected] Breaking Changes : MSAL v4→v5 migration (January 2026), Azure AD B2C sunset (May 2025 - new signups blocked, existing until 2030), ADAL retirement (Sept 2025 - complete) Last Updated : 2026-01-21 --- Architecture Overview Key Constraint : MSAL.js does NOT work in Cloudflare Workers (relies on browser/Node.js APIs). Use jose library for backend token validation. --- Quick Start 1. Install Dependencies 2. Azure Portal Setup 1. Go to Microsoft Entra ID…