How do you handle multi-tenant apps?

Short answer: Register app with multi-tenant support in Azure AD. Use common or organizations endpoint for authentication: Validate tenant ID in API to ensure authorized access.

Real-world example (ShopNest)

ShopNest on Azure typically uses App Service + SQL Database + Blob Storage + Application Insights for monitoring.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.