Monthly news - May 2026
Microsoft Defender Monthly news - May 2026 Edition This is our monthly "What's new" blog post, summarizing product updates and various new assets we released over the past month across our Defender products. In this edition, we are looking at all the goodness from April 2026. We are now including news related to Defender for Cloud in the Defender portal. For all other Defender for Cloud news, have a look at the dedicated Defender for Cloud Monthly News here. 🚀 New Virtual Ninja Show episode: The future of identity protection with Predictive Shielding Network-layer data protection with Microsoft Entra GSA and Purview DLP Data lake federation: hunt across external data without ingesting it Weekly Security News: We publish a short 1ish minute video every week with updates across our Microsoft Security stack. Subscribe to our YouTube channel, so you don't miss the next episode. Actionable threat insights CVE-2026-31431: Copy Fail vulnerability enables Linux root privilege escalation across cloud environments Email threat landscape: Q1 2026 trends and insights Cross‑tenant helpdesk impersonation to data exfiltration: A human-operated intrusion playbook Detection strategies across cloud and identities against infiltrating IT workers Dissecting Sapphire Sleet’s macOS intrusion from lure to compromise Microsoft Defender Blog post: Containing a domain compromise: How predictive shielding shut down lateral movement (Public Preview) You can now view the current status of automatic attack disruption and predictive shielding actions related to a specific incident. You view this data in the Activities tab of the incident page. Learn more We made several enhancements across the Advanced hunting experience, read this blog post for all the details. (Public Preview) The AIAgentsInfo table in advanced hunting now includes additional columns that provide deeper visibility into AI agents operating in your Microsoft 365 environment. These fields expand coverage beyond Copilot Studio to all agent types, including Microsoft Foundry, third-party marketplace, and custom line-of-business agents. (Generally Available) Built-in alert tuning rules are now generally available. Built-in alert tuning rules suppress alerts from common benign activity in Defender for Endpoint and Defender for Office 365 without affecting Automated Investigation and Response (AIR) investigations and email notifications. Microsoft Defender Experts for XDR customers can now see Defender Experts as a distinct entry in the Microsoft Defender portal navigation menu. This feature adds to the existing home page status card as in-portal experiences that provide consistent and predictable access to the service. Learn more Blog post: Simplifying AWS defense with Microsoft Sentinel UEBA Call to action: update automation by July 1, 2026 - Account Name is now consistently the UPN prefix for analytics rule alerts! Microsoft Sentinel is updating how the account entity's Account Name value is populated for analytics rule alerts when the full UPN is mapped into Account Name. This change improves consistency for downstream automation rules and Logic Apps playbooks. For more information, including before and after examples, read the blog article Update: Changing the Account Name Entity Mapping in Microsoft Sentinel. For all other Sentinel News, have a look at the "What's new in Microsoft Sentinel blog post - April edition" Microsoft Defender for Endpoint / Microsoft Defender Vulnerability Management (Public Preview) You can now view the current status of automatic attack disruption and predictive shielding actions related to a specific incident. You view this data in the Activities tab of the incident page. Learn more Microsoft Secure Score now includes the Ensure devices are updated to Secure Boot 2023 certificates and boot manager, which helps identify devices that haven't yet transitioned to the new Secure Boot 2023 certificates required ahead of the June 2026 expiration. To learn more about the recommendation, see Assess Secure Boot status with Microsoft Defender (blog). Microsoft Defender for Identity (Public Preview) Custom account correlation rules. Custom account correlation rules let you link accounts that belong to the same identity, such as privileged accounts with unique naming conventions. You can correlate accounts that don't share strong identifiers such as account ID, SID, object ID, or UPN by defining rules based on UPN prefix, UPN suffix, domain UPN, or employee ID. For more information, see Create custom account correlation rules. (Generally Available) The Automatic Windows event-auditing configuration for sensors v3.x is now generally available. Automatic Windows event-auditing streamlines deployment by automatically applying the required auditing settings to new sensors and correcting misconfigurations on existing ones.Monthly news - January 2026
Microsoft Defender Monthly news - January 2026 Edition This is our monthly "What's new" blog post, summarizing product updates and various new assets we released over the past month across our Defender products. In this edition, we are looking at all the goodness from December 2025. Defender for Cloud has its own Monthly News post, have a look at their blog space. 🚀 New Virtual Ninja Show episode: Advancements in Attack Disruption Vulnerability Remediation Agent in Microsoft Intune Microsoft Defender (Public Preview) The following advanced hunting schema tables are now available for preview: The CampaignInfo table contains contains information about email campaigns identified by Microsoft Defender for Office 365 The FileMaliciousContentInfo table contains information about files that were processed by Microsoft Defender for Office 365 in SharePoint Online, OneDrive, and Microsoft Teams General Availability of the Security Alert Triage Agent (previously named Phishing Triage Agent): this agent autonomously analyzes user‑reported phishing emails to determine whether they’re true threats or false positives, dramatically reducing manual triage workload. It continuously learns from analyst feedback and provides clear, natural‑language explanations for every verdict, giving SOC teams both speed and transparency. We're excited to share it is now generally available and, very soon, will expand to also triage cloud and identity alerts! Learn more on our docs. Public Preview of Dynamic Threat Detection Agent: Announced at Ignite, this always‑on agent hunts for unseen threats by continuously correlating telemetry and creating new, context‑aware detections on the fly—closing gaps traditional rules can’t see. We're excited to share it is now in Public Preview! Learn more on our docs. Public Preview of Threat Hunting Agent: Announced at Ignite, this agent gives every analyst the power to investigate like an expert by turning natural‑language questions into guided, real‑time hunts that surface hidden patterns, reveal meaningful pivots, and eliminate the need to write complex queries. We're excited to share it is now in Public Preview! Learn more on our docs. General Availability of the Threat Intelligence Briefing Agent: this agent delivers daily, tailored intelligence briefings directly in Microsoft Defender—automatically synthesizing Microsoft’s global threat insights with your organization’s context to surface prioritized risks, clear recommendations, and relevant assets so teams can shift from reactive research to proactive defense in minutes. We're excited to share it is now generally available! Learn more on our docs. (General Availability) The hunting graph in advanced hunting is now generally available. It also now has two new predefined threat scenarios that you can use to render your hunts as interactive graphs. (General Availability) Advanced hunting now supports custom functions that use tabular parameters. With tabular parameters, you can pass entire tables as inputs. This approach lets you build more modular, reusable, and expressive logic across your hunting queries. Learn more Note: The Phishing Triage Agent has since been expanded and is now called the Security Alert Triage Agent. Learn more at aka.ms/SATA Microsoft Defender for Endpoint (Public Preview) Triage collection: Use triage collection to prioritize incidents and hunt threats with the Sentinel Model Context Protocol (MCP) server. Microsoft Defender for Identity New ADWS LDAP search activity is now available in the 'IdentityQueryEvents' table in Advanced Hunting. This can provides visibility into directory queries performed through ADWS, helping customers track these operations and create custom detection based on this data. (Public Preview) New properties for 'sensorCandidate' resource type in Graph-API. Learn more here. Microsoft Defender for Cloud Apps Integration of Defender for Cloud Apps permissions with Microsoft Defender XDR Unified RBAC is now available worldwide. For more information, see Map Microsoft Defender for Cloud Apps permissions to the Microsoft Defender XDR Unified RBAC permissions. To activate the Defender for Cloud Apps workload, see Activate Microsoft Defender XDR Unified RBAC. (Public Preview) The Defender for Cloud Apps app governance unused app insights feature helps administrators identify and manage unused Microsoft 365-connected OAuth apps, enforce policy-based governance, and use advanced hunting queries for better security. This feature is now available for most commercial cloud customers. For more information, see Secure apps with app hygiene features.Learn more about Microsoft Security Communities.
In the last five years, Microsoft has increased the emphasis on community programs – specifically within the security, compliance, and management space. These communities fall into two categories: Public and Private (or NDA only). In this blog, we will share a breakdown of each community and how to join.Monthly news - October 2025
Microsoft Defender Monthly news - October 2025 Edition This is our monthly "What's new" blog post, summarizing product updates and various new assets we released over the past month across our Defender products. In this edition, we are looking at all the goodness from September 2025. Defender for Cloud has it's own Monthly News post, have a look at their blog space. ⏰ Microsoft Ignite 2025 November 18-20, register now! 🚀 New Virtual Ninja Show episodes: Defender for Endpoint: Customize settings for optimum performance The new Defender for Identity sensor explained Expanding Microsoft Sentinel UEBA Transitioning the Sentinel SIEM experience from Azure to the Defender portal Microsoft Defender Move your Microsoft Sentinel experience into Microsoft Defender to streamline security operations into a single, AI-powered interface. This move enhances analyst efficiency, integrates threat insights, and improves response times through automation and advanced posture management. Customers are encouraged to begin planning their migration now to ensure a smooth transition and maximize the benefits of the new experience. Learn more about panning your move to the Defender portal here. Microsoft Defender delivered 242% return on investment over three years. The latest 2025 commissioned Forrester Consulting Total Economic Impact™ (TEI) study reveals a 242% ROI over three years for organizations that chose Microsoft Defender. Read more in our blog. Custom detection rules get a boost. If you are a Microsoft Sentinel user and have connected your Sentinel workspace to Microsoft Defender, you are probably more familiar with analytics rules in Microsoft Sentinel and are looking to explore the capabilities and benefits of custom detections. Understanding and leveraging custom detection rules can significantly enhance your organization's security posture. This blog will delve into the benefits of custom detections and showcase scenarios that highlight their capabilities, helping you make the most of this robust feature. (Public Preview) In advanced hunting, you can now hunt using the hunting graph, which renders rendering predefined threat scenarios as interactive graphs. (Public Preview) You can investigate incidents using Blast radius analysis, which is an advanced graph visualization built on the Microsoft Sentinel data lake and graph infrastructure. This feature generates an interactive graph showing possible propagation paths from the selected node to predefined critical targets scoped to the user’s permissions. Microsoft Defender for Cloud Apps (Public Preview) Protect Copilot Studio AI Agents in Real Time with Microsoft Defender. Microsoft Defender offers real-time protection during runtime for AI agents built with Microsoft Copilot Studio. This capability automatically blocks the agent’s response during runtime if a suspicious behavior like a prompt injection attack is detected, and notifies security teams with a detailed alert in the Microsoft Defender portal. Learn more about it in this blog. Protect against OAuth Attacks in Salesforce with Microsoft Defender. In this blog, we will delve only into one of the Salesforce OAuth attack campaign and provide guidance on how organizations can use Microsoft Defender to protect against this and similar SaaS attack campaigns. Microsoft Defender for Identity Defender for Identity data centers are now also deployed in the United Arab Emirates, North and Central regions. For the most current list of regional deployments, see Defender for Identity data locations. (Public Preview) We are excited to announce the availability of a new Graph-based API for managing unified agent server actions in Defender for Identity. This capability is currently in preview and available in API Beta version. This API allows customers to: Monitor the status of unified agent servers Enable or disable the automatic activation of eligible servers Activate or deactivate the agent on eligible servers For more information, see Managing unified agent actions through Graph API. Several Defender for Identity detections are being updated to reduce noise and improve accuracy, making alerts more reliable and actionable. As the rollout continues, you might see a decrease in the number of alerts raised. Learn more on our docs page. We've added a new tab on the Identity profile page that contains all active identity-related identity security posture assessments (ISPMs). This feature consolidates all identity-specific security posture assessments into a single contextual view, helping security teams quickly spot weaknesses and take targeted actions. Learn more on our docs page. (Public Preview) Defender for Identity supports the Unified connectors experience, starting with the Okta Single Sign-On connector. This enables Defender for Identity to collect Okta system logs once and share them across supported Microsoft security products, reducing API usage and improving connector efficiency. For more information, see: Connect Okta to Microsoft Defender for Identity Microsoft Defender for Office 365 Near real-time URL protection in Teams messages: - Known, malicious URLs in Teams messages are delivered with a warning. Messages found to contain malicious URLs up to 48 hours after delivery also receive a warning. The warning is added to messages in internal and external chats and channels for all URL verdicts (not just malware or high confidence phishing). Users can report external and intra-org Microsoft Teams messages as non-malicious (not a security risk) from the following locations: Chats Standard, shared, and private channels Meeting conversations User reported settings determine whether reported messages are sent to the specified reporting mailbox, to Microsoft, or both. Also added support for Teams message reporting on Teams mobile client. Microsoft Security Exposure Management Cloud Attack Paths now reflect real, externally driven and exploitable risks that adversaries could use to compromise your organization, helping you cut through the noise and act faster. The paths now focus on external entry points and how attackers could progress through your environment reaching business-critical targets. Read more about it in this blog: Refining Attack Paths: Prioritizing Real-World, Exploitable Threats The legacy Azure AD Connect asset rule has been removed from Critical Assets. Its associated device role, AzureADConnectServer, will be deprecated in December 2025. Ensure all relevant custom rules are transitioned to use the new device role, EntraConnectServer, to maintain compliance and visibility. For more information, see Predefined classification. New predefined classifications: predefined Device classification rules for SharePoint Server and Microsoft Entra ID Cloud Sync were added to the critical assets list. For more information, see Predefined classification. We have added new data connectors for Wiz and Palo Alto Prisma. These connectors enable seamless integration of vulnerability and asset data from leading cloud security platforms into Microsoft Security Exposure Management, providing enhanced visibility and context for your environments. For more information, see: Wiz data connector, Palo Alto Prisma data connector. Microsoft Security Blogs https://www.microsoft.com/en-us/security/blog/2025/09/24/ai-vs-ai-detecting-an-ai-obfuscated-phishing-campaign/ Microsoft Threat Intelligence recently detected and blocked a credential phishing campaign that likely used AI-generated code to obfuscate its payload and evade traditional defenses, demonstrating a broader trend of attackers leveraging AI to increase the effectiveness of their operations and underscoring the need for defenders to understand and anticipate AI-driven threats. XCSSET evolves again: Analyzing the latest updates to XCSSET’s inventory Microsoft Threat Intelligence has uncovered a new variant of the XCSSET malware, which is designed to infect Xcode projects, typically used by software developers building Apple or macOS-related applications.Retired: The Data Loss Prevention Ninja Training is here!
August 2025: New Ninja training can be found at https://aka.ms/DLPNinja RETIRED July 2025: Under Construction for new hosting location The Microsoft Purview Data Loss Prevention Ninja Training is here! We are very excited and pleased to announce this rendition of the Ninja Training Series. With all the other training out there, our team has been working diligently to get this content out there. There are several videos and resources out there and the overall purpose of the Microsoft Purview Data Loss Prevention Ninja training is to help you master this realm. We aim to get you up-to-date links to the community blogs, training videos, Interactive Guides, learning paths, and any other relevant documentation. To make it easier for you to start and advance your knowledge gradually without throwing you in deep waters, we split content in each offering into three levels: beginner, intermediate, and advanced. Please find the Microsoft Purview Information Protection Ninja Training here. In addition, after each section, there will be a knowledge check based on the training material you’d have just finished! Since there’s a lot of content, the goal of these knowledge checks is to help you determine if you were able to get a few of the major key takeaways. There’ll be a fun certificate issued at the end of the training: Disclaimer: This is NOT an official Microsoft certification and only acts as a way of recognizing your participation in this training content. Lastly, this training will be updated one to two times a year to ensure you all have the latest and greatest material! If there's any topic you'd like for us to include and/or have any thoughts on this training, please let us know what you think below in the comments! Legend/Acronyms (D) Microsoft Documentation (V) Video (B) Blog (P) PDF (S) Site (SBD) Scenario Based Demo (Video) (DAG) Deployment Acceleration Guide MIP Microsoft Information Protection (old terminology for Microsoft Purview Information Protection) AIP Azure Information Protection ULC Unified Labeling Client SIT Sensitive Information Type RBAC Role-based access control eDLP Endpoint DLP OME Office 365 Message Encryption EDM Exact Data Match DLP Data Loss Prevention SPO SharePoint Online OCR Optical character recognition MCAS Microsoft Cloud App Security (old terminology for Microsoft Defender for Cloud Apps) TC Trainable Classifiers ODSP OneDrive SharePoint EXO Exchange Online Microsoft Purview Data Loss Prevention (DLP) Microsoft’s DLP solution provides a broad range of capabilities to address the modern workplace and the unique challenges represented by these very different scenarios. One of the key investment areas is in providing a unified and comprehensive solution across the many different kinds of environments and services where sensitive data is stored, used or shared. This includes platforms native to Microsoft and also non-Microsoft services and apps. Beginner Training Public forums to contact the overall information protection team Yammer Tech Community Introducing Microsoft Purview (V) In this video, hear from Microsoft executives on this new product family and our vision for the future of data governance. Introduction to Microsoft Purview Data Loss Prevention? (V) In this video, you’ll find an overview on Microsoft Purview Data Loss Prevention. Quick overview on new Exchange DLP Predicates (V) This video provides a quick walk through on creating an Exchange DLP policy and a soft focus on the new predicates and actions. Microsoft Purview Information Protection Framework (D) Check out the above documentation to see how Microsoft Purview Information Protection uses 3 pillars to deploy an information protection solution. Protect Data with Zero Trust (LP) Zero Trust isn't a tool or product, it's an essential security strategy, with data at its core. Here, you'll learn how to identify and protect your data using a Zero Trust approach. Learn about data loss prevention (D) Learn about DLP basics and Microsoft Unified DLP and why it’s uniquely positioned to protect your data in the cloud. How to secure your data with Microsoft Security (V) The above video is a quick summary on how to protect your data. Microsoft Purview Information Protection and Data Loss Prevention Roadmap (S) Please check out the above site on the latest items on our public roadmap. Microsoft Purview Information Protection support for PDF and GitHub (V) and Ignite Conversation (V) The above videos walk through announcements regarding support for PDF and GitHub Microsoft Defender for Cloud Apps integration (D) Please visit the above documentation to learn more about how Microsoft Purview Information Protection integrates with Microsoft Defender for Cloud Apps Trainable Classifiers (D) Check out the documentation to create custom trainable classifiers. Retrain a classifier in content explorer (D) The above documentation shows you how to improve the performance of custom trainable classifiers by providing them more feedback. Explain data loss prevention reporting capabilities (LP) The above learning path walks you through reporting in the Microsoft Purview Compliance Portal. Review and analyze data loss prevention reports (LP) The above learning path walks you through analyzing reports in the Microsoft Purview Compliance Portal. Beginner Knowledge Check Intermediate Training Microsoft Compliance Extension for Chrome (B) aka Microsoft Purview Extension (D) Please check out the above blog and Microsoft Doc to understand what we’re doing to expand our DLP capabilities to Chrome. Microsoft Purview extension for Firefox (D) The above documentation details procedures to roll out the Microsoft Purview extension for Firefox. Data Loss Prevention and Endpoint DLP (V) This video details how Microsoft approaches information protection across Files, emails, Teams, endpoints and others. How DLP works between the Compliance portal and Exchange admin center (D) You can create a data loss prevention (DLP) policy in two different admin centers; the above document walks through the differences and similarities. Data Loss Prevention across endpoints, apps, & services | Microsoft Purview (V) This video walks you through how to protect sensitive data everywhere you create, view, and access information with one Data Loss Prevention policy in Microsoft Purview. Data Loss Prevention Policy Tips Reference Guide (D) and Quick Overview (V) Please check out the above documentation and short video on where we support policy tips. Create a DLP Policy for Microsoft 365 Online Services (IG) Please use the above interactive guide to see how to create DLP policies. Apply Microsoft Purview Endpoint DLP to Devices (IG) Please use the above interactive guide to see how to create Endpoint DLP policies. Sites for testing documentation (S) The above site details locations where you can get sample data. Scope of DLP Protection for Microsoft Teams (D) The above documentation walks through how DLP protection is applied differently to Teams entities. Manage DLP alerts in the Microsoft Purview compliance portal (LP) The above learning path walks you through managing DLP alerts. Endpoint activities you can monitor and best practices (LP) The above learning path walks you through Endpoint DLP activities and best practices. Troubleshoot and Manage Microsoft Purview Data Loss Prevention for your Endpoint Devices (B) The above blog goes through a quick guide to troubleshooting Endpoint DLP. Microsoft Purview DLP Interactive Guides (IG) Please visit the above home page to see the latest interactive guides walking you through DLP. Learn how to investigate Microsoft Purview Data Loss Prevention alerts in Microsoft 365 Defender (B) This blog is a step-by-step guided walkthrough of the Microsoft 365 Defender Analyst experience for Microsoft Purview Data Loss Prevention (DLP) incident management. Intermediate Knowledge Check Advanced Training Microsoft Defender for Cloud Apps and Data Loss Preventions (D) Please check out the documentation above detailing how the integration to Microsoft Defender for Cloud Apps further enhances your data loss prevention plan. Power BI: Learn about centralized data loss prevention policies (V) This video highlights DLP capabilities with Power BI. Take a unified and comprehensive approach to prevent data exfiltration with Microsoft (V) This video helps show how we can help you prevent unauthorized sharing, use, and transfer of sensitive information across your applications, services, endpoints, and on-premises file shares – all from a single place. Onboard macOS devices into Microsoft 365 (D), capability announcement (B), and additional screengrabs (B) Please use the documentation above to deploy macOS devices into Endpoint DLP and check out the blog to see a few screengrabs on how the user experience. Troubleshooting Guides (D) Resolve issues that affect DLP policy tips Changes to a data loss prevention policy don't take effect in Outlook 2013 in Microsoft 365 DLP policy tips in Security and Compliance Center don't work in OWA/Outlook How to troubleshoot data loss prevention policy tips in Exchange Online Protection in Microsoft 365 Please check out the below documentation to find guides on common issues. Securing data in an AI-first world with Microsoft Purview (B) The above blog details some new updates on AI with Microsoft Purview. Common questions on Microsoft Purview Data Loss Prevention for endpoints (B) This guide covers the top-of-mind FAQs on Microsoft Purview Data Loss Prevention for endpoints (referred to as Endpoint DLP in the blog). Guidance for investigating Microsoft Purview Data Loss Prevention incidents (B) This blog provides guidance for choosing the best investigation experience suited for your organization when using Microsoft Purview Data Loss Prevention. Data Loss Prevention: From on-premises to cloud (PDF) This whitepaper focuses on why you should move to cloud-native data loss prevention. The Microsoft Purview DLP Migration Assistant for Symantec (IG) Follow the above IG to get guidance on migrating from Symantec to Microsoft Purview DLP. Migrating from Windows Information Protection to Microsoft Purview (B) The above blog gives guidance on how to migrate from WIP to the Microsoft Purview stack. Insider Risk in Conditional Access | Microsoft Entra + Microsoft Purview Adaptive Protection (V) The above video goes through how to protect your organization from insider threats with Microsoft Entra's Conditional Access and Adaptive Protection in Microsoft Purview. Please check out this link for a blog with more details. (B) Protect sensitive data throughout its Copilot journey (B) The above details how the native integration enables organizations to leverage the power of GenAI when working with sensitive data as Copilot can understand and honor the controls such as encryption and provide comprehensive visibility into usage. Protect at the speed and scale of AI with Copilot for Security in Microsoft Purview (B) The above blog details the embedded experiences of Copilot for Security in Microsoft Purview (Communication Compliance, Data Loss Prevention, Insider Risk Management, and eDiscovery. Strengthen protection to mitigate data overexposure in GenAI tools with data classification/labeling (B) The blog above goes into detail on OCR, its cost, and how it goes into the AI Realm with Microsoft Purview Information Protection and Data Loss Prevention. Microsoft Purview Exact Data Match (EDM) support for multi-token corroborative evidence (B) The above blog goes into the new feature that improves the accuracy and effectiveness of EDM detection. Advanced Knowledge Check Once you’ve finished the training and the knowledge checks, please go to our attestation portal to generate your certificate; you'll see it in your inbox within 3-5 business days (Coming Soon). We hope you enjoy this training!
