AI-powered defense for an AI-accelerated threat landscape

A set of Microsoft Security Blog posts covering defensive strategies and recent threat activity. Microsoft describes partnerships (notably with Anthropic) to apply large models to detection and automated defense, rethinking SOC operations with agentic/autonomous defenses, and updating incident response for AI-driven incidents. Operational guidance and threat reporting include detection and mitigation for cross-tenant Teams helpdesk impersonation and human-operated intrusions, a domain compromise case mitigated by predictive shielding, cryptographic inventory and quantum-safe readiness, a North