The Curious Engineer

All blogs / Security

Microsoft Defender for Office 365 Blog

techcommunity.microsoft.com/category/microsoft-defender-for-office-365/blog/microsoftdefenderforoffice365blog

SecurityMicrosoft blogsMicrosoft Tech Community

’20’21’22’23’24’25’26
Posts
120 from 22 Sep 2020 to 27 Oct 2026
Posting
monthly (15 in the last year)
Kind
company blog

2026 10

  1. Part 4: See, investigate, and measure email and collaboration attacks with Defender reporting
  2. Proofpoint’s Core Email Protection API solution joins the Microsoft Defender ICES vendor ecosystem
  3. Defending the Inbox Against Prompt Injection Attacks
  4. Microsoft Defender for Office 365 Plan 1 is now rolling out to Microsoft 365 E3 and Office 365 E3
  5. Granular email content access with unified RBAC – now the default for new Defender tenants
  6. Declutter and Defend: Reducing promotional mail noise with Microsoft Defender
  7. Announcing Public Preview: Security Copilot’s Email Summary in Microsoft Defender
  8. From Impersonation Calls to Transparent Reporting: Defending the New Front Door of Attacks
  9. Part 3: Build custom email security reports with Power BI and workbooks in Microsoft Sentinel
  10. Secure collaboration in Microsoft Teams with efficient and automated Threat Protection and response

2025 21

  1. Strengthening calendar security through enhanced remediation
  2. Microsoft Ignite 2025: Transforming Phishing Response with Agentic Innovation
  3. Microsoft Defender for Office 365: Fine-Tuning
  4. You may be right after all! Disputing Submission Responses in Microsoft Defender for Office 365
  5. Ensure your ICES solution works seamlessly alongside Microsoft Defender
  6. Safeguarding Microsoft Teams with Microsoft Defender for Office 365
  7. Microsoft Defender for Office 365: Migration & Onboarding
  8. Protection against multi-modal attacks with Microsoft Defender
  9. Submissions Response Using AI for Enhanced Result Explainability
  10. Protection Against Email Bombs with Microsoft Defender for Office 365
  11. Introducing the Microsoft Defender for Office 365 ICES vendor ecosystem
  12. Auto-Remediation of Malicious Messages in Automated Investigation and Response (AIR) is GA
  13. Part 2: Build custom email security reports and dashboards with workbooks in Microsoft Sentinel
  14. Microsoft Defender for Office 365's Language AI for Phish: Enhancing Email Security
  15. SafeLinks Protection for Links Generated by M365 Copilot Chat and Office Apps
  16. SOC can see Microsoft analysis for Third-party add-in user report
  17. Strengthening Email Ecosystem: Outlook’s New Requirements for High‐Volume Senders
  18. General Availability for Collaboration Security for Microsoft Teams
  19. Strengthening Email Security: Our New Approach to Non-RFC Compliant Emails
  20. Built-in report button is available in Microsoft Outlook across platforms
  21. Build custom email security reports and dashboards with workbooks in Microsoft Sentinel

2024 22

  1. Microsoft Ignite: Redefining email security with LLMs to tackle a new era of social engineering
  2. Create targeted attack simulation training campaigns with dynamic groups
  3. Use community queries to hunt more effectively across email and collaboration threats
  4. Improve end user resilience against QR code phishing
  5. How your submissions to Defender for Office 365 are processed behind-the-scenes
  6. Secure architecture design – How Defender for Office 365 protects against EchoSpoofing
  7. Automate Tenant Allow/Block List entries
  8. Announcing Microsoft Defender for Office 365 API’s for retrieving threat data and remediating emails
  9. Announcing quarantine release integration in Microsoft Defender for Office 365 hunting experience!!
  10. Introducing Bulk Senders Insight: Optimizing Bulk Email Management for Enterprises
  11. Automated end-user feedback response is now GA
  12. Email Protection Basics in Microsoft 365 Part Five: Mastering Overrides
  13. Enhanced Response Action Experience from Threat Explorer
  14. Attack Simulation Training is now available for GCC High and DoD customers
  15. Copy simulations in Attack Simulation Training is now GA
  16. Gone Phishing Tournament™ Takeaways
  17. Hunting and responding to QR code-based phishing attacks with Defender for Office 365
  18. Announcing persistent views and UX enhancements in Threat Explorer
  19. Permissions Management: Defender XDR's RBAC Walkthrough for Microsoft Defender for Office 365
  20. Updates to Configuration Analyzer in Microsoft defender for Office 365
  21. Learn more about LinkedIn Smart Link Phish Campaigns
  22. Train your users to be more resilient against QR code phishing

2023 18

  1. Protect your organizations against QR code phishing with Defender for Office 365
  2. Enhanced action experience (Action wizard V2) from Email entity / Summary panel
  3. Authenticate Outbound Email to Improve Deliverability
  4. Test your team’s security readiness with the Gone Phishing Tournament
  5. Send "How-to guides" to your organization from Attack Simulation training
  6. Announcing the availability of in-product guidance!
  7. Announcing New DMARC Policy Handling Defaults for Enhanced Email Security
  8. SANS training content now available within Attack Simulation Training!
  9. Threat Explorer: UX enhancements, URL clicks tab and customizable export
  10. Responding to targeted mail attacks with Microsoft 365 Defender
  11. Introducing the release of Attack Simulation Training Write API functionality
  12. Training only campaign is now available with an expanded training module library
  13. Attack Simulation Training: Using machine learning to drive more effective simulations
  14. Email Protection Basics in Microsoft 365: Anti-malware, Safe Attachments, and Quarantine
  15. Announcing Collaboration Security for Microsoft Teams
  16. Enhanced threat detection with URL click alerts by Microsoft Defender for Office 365
  17. Introducing the New Post-delivery Activities Report in Microsoft Defender for Office 365
  18. Attack Simulation Training: New insights into targeted user behavior

2022 24

  1. Security MVP Spotlight (Most Valuable Professional)
  2. Getting started as a Security MVP (Most Valuable Professional)
  3. Why Microsoft is the right choice for healthcare
  4. Microsoft announces partnership with SANS Institute
  5. Build custom email security reporting with Microsoft Defender for Office 365 and PowerBI
  6. Introducing the Microsoft Defender for Office 365 Security Operations Guide
  7. Email Protection Basics in Microsoft 365: Spoof and Impersonation
  8. step-by-step guides - v2 release!
  9. Introducing tenant blocks via admin submissions
  10. Introducing new actions from the Email Entity page!
  11. Exciting Feature Updates to Attack Simulation Training
  12. Email Protection Basics in Microsoft 365: Spam & Phish
  13. Microsoft Defender for Office 365 Ninja Training: June 2022 Update
  14. Announcing the release of step-by-step guides!
  15. Email Protection Basics in Microsoft 365: Bulk Email
  16. Improving “Defense in Depth” with Trusted ARC Sealers for Microsoft Defender for Office 365
  17. Evaluate Defender for Office 365 in your environment!
  18. Configurable impersonation protection and scope for Preset Security policies
  19. Simplifying the Quarantine Experience - Part Two
  20. Email remediation actions now available in unified Action Center
  21. Introducing the UrlClickEvents table in advanced hunting with Microsoft Defender for Office 365
  22. Introducing differentiated protection for priority accounts in Microsoft Defender for Office 365
  23. Streamlining the submissions experience in Microsoft Defender for Office 365
  24. Microsoft Defender for Office 365 Ninja Training: January 2022 Update

2021 21

  1. Updated Hunting and Investigation Experiences for Microsoft Defender for Office 365
  2. Introducing the Microsoft Defender for Office 365 Migration Guide
  3. Mastering Configuration in Defender for Office 365 - Part Three
  4. Reporting an email in Microsoft Defender for Office 365
  5. Automatic Redirection to Microsoft 365 Defender is coming!
  6. Improving the reporting experience in Microsoft Defender for Office 365
  7. Microsoft Defender for Office 365 Ninja Training: September 2021 Update
  8. Automatically triage phish submissions in Microsoft Defender for Office 365
  9. Simplifying the Quarantine Experience
  10. Microsoft Teams gets more Phishing Protection!
  11. Making the SecOps Team More Efficient - Focused Email Actions
  12. ICYMI: Announcing Microsoft 365 Defender Streaming API
  13. Join us for an AMA!
  14. Mastering Configuration in Defender for Office 365 - Part Two
  15. Mastering Configuration in Defender for Office 365 - Part One
  16. Introducing the Email Entity Page in Microsoft Defender for Office 365!
  17. Become a Microsoft Defender for Office 365 Ninja! | June 2022
  18. Business Email: Uncompromised - Part Three
  19. New Home for Microsoft Defender for Office 365
  20. Business Email: Uncompromised – Part Two
  21. Business Email: Uncompromised – Part One

2020 4

  1. Investigating Alerts in Defender for Office 365
  2. Enhanced Filtering for Connectors: Supporting hybrid mail routing configurations in Office 365
  3. Office 365 ATP is now Microsoft Defender for Office 365
  4. Announcing Priority Account Protection in Microsoft Defender for Office 365