defender-easm

Guidance for Microsoft Defender External Attack Surface Management (Defender EASM) — discovers and inventories an organization's internet-facing assets (domains, hosts, IPs, SSL certs, ASNs, web pages, contacts) from the outside-in. Covers seed-based discovery, attack surface insights (CVEs, expiring certs, deprecated tech, unsanctioned cloud), labels and groups, integration with Defender for Cloud (CSPM), Defender XDR, and Sentinel, and pricing model (per asset). WHEN: Defender EASM, external attack surface management, internet-facing inventory, shadow IT discovery, expired SSL discovery, exposed RDP discovery, unknown subdomain, attack surface insights, seed-based discovery, outside-in scanning, third-party asset risk, M&A asset discovery. DO NOT USE for internal asset discovery (use defender-for-cloud-hardening / Defender XDR), endpoint vuln scan (use defender-for-endpoint MDVM), or Sentinel hunting alone.