Christophe Fiessinger

Microsoft 365 program manager; born in France; Canadian; Seattle based; cooking in 140 chars; runner; world observer; carpe diem.

[Christophe Fiessinger @cfiessinger]

What’s new in Microsoft Security: May 2026 https://t.co/eCPc7CUqGK

[Christophe Fiessinger @cfiessinger]

Microsoft Agent 365, now generally available, expands capabilities and integrations https://t.co/9IOD8Qwqxw

[Christophe Fiessinger @cfiessinger]

Review personal data examinations in Data Security Investigations https://t.co/XzIfB1zbbF

[Christophe Fiessinger @cfiessinger]

MCP Apps now available in Copilot chat https://t.co/MB3XkfYfsG

[Christophe Fiessinger @cfiessinger]

Anthropic is taking steps to arm some of the world’s biggest technology companies with tools to find and patch bugs in their hardware and software. https://t.co/hYFuFOvVz5 via @WSJ

[Christophe Fiessinger @cfiessinger]

Observability for AI Systems: Strengthening visibility for proactive risk detection https://t.co/FTjjg2P66M

[Christophe Fiessinger @cfiessinger]

Threat actor abuse of AI accelerates from tool to cyberattack surface https://t.co/CQqKQDgcGX

[Christophe Fiessinger @cfiessinger]

Get started with the Data Security Posture agent (preview) in Data Security Investigations https://t.co/N0bppC5dgI

[Christophe Fiessinger @cfiessinger]

Copilot Cowork: Now available in Frontier https://t.co/7GaFTH8TVa

[Microsoft Mechanics @MSFTMechanics]

Protect sensitive information from further distribution with fast, controlled remediation. Start here with Microsoft Purview Data Security Investigations.
 https://t.co/W4Nb0hlKvS Identify what data was exposed in a breach, not just where it moved, but what it contains, how sensitive it is, and the risk it creates using Microsoft Purview Data Security Investigations. Search across massive volumes of files using natural language, pinpoint the highest risk content, and connect it to user activity to see the full scope of an incident. #DSIPurview #purview #datagovernance #microsoft #microsoft365 #microsoftsecurity

[Microsoft Mechanics @MSFTMechanics]

Connect sensitive data with user activity and access patterns to see the full scope of a potential breach. See how Insider Risk Management, Data Security Posture Management, and Data Security Investig https://t.co/W4Nb0hlKvS Identify what data was exposed in a breach, not just where it moved, but what it contains, how sensitive it is, and the risk it creates using Microsoft Purview Data Security Investigations. Search across massive volumes of files using natural language, pinpoint the highest risk content, and connect it to user activity to see the full scope of an incident. #DSIPurview #purview #datagovernance #microsoft #microsoft365 #microsoftsecurity

[Christophe Fiessinger @cfiessinger]

Data Security Investigations in Microsoft Purview by @MSFTMechanics https://t.co/sez2p9QU0y

[Microsoft Mechanics @MSFTMechanics]

Contain data leaks immediately by purging exposed files while retaining investigation evidence. Take action with Microsoft Purview Data Security Investigations. https://t.co/W4Nb0hlKvS Identify what data was exposed in a breach, not just where it moved, but what it contains, how sensitive it is, and the risk it creates using Microsoft Purview Data Security Investigations. Search across massive volumes of files using natural language, pinpoint the highest risk content, and connect it to user activity to see the full scope of an incident. #DSIPurview #purview #datagovernance #microsoft #microsoft365 #microsoftsecurity

[Microsoft Mechanics @MSFTMechanics]

Pinpoint high-risk files hidden among hundreds of confidential documents using contextual search. See how Microsoft Purview Data Security Investigations works. https://t.co/W4Nb0hlKvS Identify what data was exposed in a breach, not just where it moved, but what it contains, how sensitive it is, and the risk it creates using Microsoft Purview Data Security Investigations. Search across massive volumes of files using natural language, pinpoint the highest risk content, and connect it to user activity to see the full scope of an incident. #DSIPurview #purview #datagovernance #microsoft #microsoft365 #microsoftsecurity

[Microsoft Mechanics @MSFTMechanics]

Uncover sensitive data, surface your biggest risks, and drive action. Start with the Data Security Posture and Triage Agents. https://t.co/WeMHQ50ZKw Cut through alert noise and focus on the risks that matter with Agents in Microsoft Purview. Use Data Security Triage Agent to prioritize incidents, investigate user activity with full context, and uncover hidden patterns that signal real threats. Identify and act on high-risk behavior, like data exfiltration or persistent access, before it leads to data loss. #AgentsinPurview #purview #datagovernance #microsoft #microsoft365 #microsoftsecurity

[Christophe Fiessinger @cfiessinger]

@magrom You need an agent fo this!

[Microsoft Security @msftsecurity]

As agents evolve, security teams have to keep up.

That’s why we’re expanding Agent 365 to include:
✅ Visibility into AI-related risk across the org and app estate
✅ Securing identities with continuous, risk‑aware access
✅ Blocking sensitive information from being used in prompts

And more. Learn more: https://t.co/oLcAa7yKZG

[Christophe Fiessinger @cfiessinger]

Secure data as AI scales: New Microsoft Purview innovations at RSA 2026 | Microsoft Community Hub https://t.co/kuiVOc6pHq

[Christophe Fiessinger @cfiessinger]

When tax season becomes cyberattack season: Phishing and malware campaigns using tax-related lures https://t.co/cuRICSnjJK

[Christophe Fiessinger @cfiessinger]

Introducing the First Frontier Suite built on Intelligence + Trust https://t.co/Y8SZkhPgtK