Microsoft Defender email security benchmarking: Key insights from one year of data

This collection of Microsoft Security Blog posts highlights multiple high-risk trends and actionable findings from recent research: Microsoft Defender email benchmarking vs. SEG/ICES vendors; ASSERT, an open-source framework to convert specs into executable AI evaluations; guidance and a telemetry-driven playbook for reconstructing AI activity in Microsoft 365 Copilot and Azure AI; rising social-engineering campaigns that weaponize AI branding; a prompt-injection pathway in the Claude Code GitHub Action that could expose workflow secrets; an expanded taxonomy of agentic AI failure modes (incl.