Azure Functions and secure Configuration with built-in integration to Azure Key Vault

This article explains how to enhance security in Azure Functions by integrating Azure Key Vault to store sensitive configuration values like connection strings, rather than keeping them in plain text in App Settings. It covers setting up a System Assigned Managed Identity, granting Key Vault access policies, and using Key Vault references. The author shares real-world experience with high-volume production workloads, addressing performance, cost, and scalability impacts. The guide includes step-by-step instructions for configuring the Function App, Key Vault, and Storage Account, emphasizing DevSecOps best practices to prevent exposure of credentials even to Global Readers.