Microsoft Authentication (MSAL) in Capacitor Angular Apps: A Complete Guide

Published: February 16, 2026 Author: Václav Švára Generated with assistance from: Claude (Anthropic AI) Table of Contents Introduction The Challenge 🔴 CRITICAL: CapacitorHttp Configuration Architecture Overview Prerequisites Azure AD App Registration MSAL Configuration Authentication Service Implementation Deep Link Handling (iOS) Deep Link Handling (Android) Login Flow Token Management HTTP Interceptor Testing the Implementation Troubleshooting Security Best Practices Conclusion Introduction Implementing Microsoft Authentication (MSAL) in a Capacitor Angular application presents unique challenges compared to standard web applications. The combination of native mobile platforms (iOS/Android) with web technologies requires special handling of authentication flows, deep links, and token management. This comprehensive guide walks you through every step of implementing MSAL authentication in a Capacitor Angular app, from Azure AD configuration to production-ready code. ⚠️ IMPORTANT: Before