Defender for Cloud Apps CASB Configuration: Complete Guide

This article provides a comprehensive walkthrough for configuring Microsoft Defender for Cloud Apps (MDCA) as a Cloud Access Security Broker (CASB). It covers licensing prerequisites, cloud discovery, Conditional Access App Control, session policies, alert tuning, and OAuth app governance. The guide explains MDCA's four capability pillars: core CASB, SaaS Security Posture Management (SSPM), advanced threat protection, and app-to-app protection. It clarifies the difference between MDCA and Microsoft Defender for Cloud, and details the integration with Microsoft Entra ID and Microsoft 365 Defender. The content is structured for real-world deployment, with dependency ordering and a licensing prerequisite table for features like Cloud Discovery, Conditional Access App Control, and Information Protection.