Connecting to Azure DocumentDB (with MongoDB compatibility) using Microsoft Entra ID Managed Identity

This article provides a step-by-step tutorial on how to connect a .NET application to Azure DocumentDB (with MongoDB compatibility) using Microsoft Entra ID Managed Identity for authentication, eliminating the need for passwords in connection strings. It covers prerequisites like an Azure Cosmos DB for MongoDB (vCore) cluster on a paid tier and a user-assigned managed identity. The guide includes enabling Entra ID auth on the cluster via Azure CLI, registering the managed identity as a cluster user, and explains how tokens are handled at runtime. It is a technical tutorial focused on cloud database security and authentication in Azure, relevant to IT/technology professionals working with .NET and Azure services.