Microsoft Defender is a comprehensive family of cybersecurity solutions that provides threat prevention, detection, and response capabilities across endpoints, identities, applications, email, data, workloads, and cloud environments through unified extended detection and response (XDR) technology. Microsoft Defender leverages advanced threat intelligence from over 78 trillion daily signals and AI-powered protection to help organizations prevent cyberattacks, automate incident response, and strengthen security posture across hybrid and multicloud infrastructures.