All news with #microsoft tag

🛡️ Microsoft and researchers report threat actors abusing Microsoft Teams for extortion, social engineering, and financial theft after hijacking MFA with social engineering resets. Separate campaigns use malicious .LNK files to deliver PowerShell droppers and DLL implants that establish persistent command-and-control. Analysts also link over $2 billion in 2025 crypto thefts to North Korean‑linked groups and identify AI-driven disinformation, IoT flaws, and cloud misconfigurations as multiplying risk. Defenders are urged to harden identity, secure endpoints and apps, patch exposed services, and limit long-lived cloud credentials.

⚠️ Microsoft is addressing an ongoing outage that is preventing users from accessing Microsoft 365 services, including Teams, Exchange Online, and the Microsoft 365 admin center. The incident is being tracked on the Service Health Dashboard and Microsoft is publishing updates on its Service Health Status page. The outage is also affecting Microsoft Entra single sign-on and Multi-Factor Authentication, with some users unable to receive MFA prompts or authenticate.

📥 Microsoft is enabling threshold-based auto-archiving by default for Exchange Online, moving the oldest items to users' archive mailboxes when primary mailbox usage approaches 90%, provided an archive is provisioned and has available space. The Managed Folder Assistant will continuously monitor mailbox sizes and archive until usage drops below the threshold. Rollout begins this month for public clouds and is scheduled for government clouds in November; users can tag items with the Never Move to Archive flag to prevent them from being archived. The change complements recent Defender for Office 365 updates that detect email bombing attacks.

🛡️ Microsoft Threat Intelligence details how adversaries exploit Microsoft Teams collaboration capabilities—chat, calls, meetings, and screen sharing—at multiple stages of the attack chain. The post chronicles 2024–2025 campaigns and toolsets (phishing, malvertising, deepfakes, device code phishing, and red‑team tool reuse) that enable initial access, persistence, and exfiltration. It emphasizes layered defenses across identity, endpoints, apps, data, and network controls, and provides detection guidance, hunting queries, and product-specific recommendations to help defenders disrupt these operations.

🔐 Microsoft published a second installment of the Secure Future Initiative (SFI) patterns and practices, delivering six practical, practitioner-built guides that address network isolation, tenant hardening, Entra ID app security, Zero Trust for source code access, software supply chain protection, and centralized log collection. Each article outlines the problem, Microsoft’s internal solution, actionable customer guidance, and trade-offs to help teams apply scalable controls across complex, multi-cloud environments.

🔒 Microsoft is removing further methods that allow creating local accounts and bypassing the Microsoft account requirement during Windows 11 setup. The change appears in Windows 11 Insider Preview Build 26220.6772 (KB5065797) on the Dev Channel and is expected to reach production releases. Microsoft said it will remove known mechanisms in the OOBE experience because they can skip critical setup screens and leave a device not fully configured. Going forward, OOBE will require internet access and a Microsoft account to complete setup.

🔎 Microsoft’s Incident Response (IR) team emphasizes calm, clarity, and rapid action when customers encounter major breaches. Adrian Hill explains how IR establishes trust within the first 30 seconds and coordinates with other vendors and stakeholders to stabilize compromised environments. Field discoveries are fed back into Microsoft Threat Intelligence, enabling new detections and product protections. Follow-up recovery, containment, and strategic guidance turn response into lasting partnership.

🔧 Microsoft is investigating a bug that prevents the Copilot pane and other WebView2-dependent features from launching when multiple Office applications (Excel, Word, PowerPoint, OneNote, Publisher, Access) run concurrently. The issue occurs when one app initializes a WebView2 instance and a second app attempts to start another; closing the first app allows the pane to open normally. The Office team is working on a resolution and will provide updates when available.

🔐 Zeroday Cloud is a new hacking competition focused on open-source cloud and AI tools, offering a $4.5 million bug bounty pool. Hosted by Wiz Research with Google Cloud, AWS, and Microsoft, it takes place December 10–11 at Black Hat Europe in London. The contest features six categories covering AI, Kubernetes, containers, web servers, databases, and DevOps, with bounties ranging from $10,000 to $300,000. Participants must deliver complete compromises and register via HackerOne.

🔒 Microsoft will no longer display inline SVG images in Outlook for Web and the new Outlook for Windows; users will instead see blank spaces where those images would have appeared. The global rollout began in early September 2025 and is expected to complete by mid‑October 2025, with Microsoft estimating the change will affect less than 0.1% of images. SVG files sent as classic attachments will continue to be viewable from the attachment well to limit user disruption.

🔒 Microsoft has been named a Leader in the IDC MarketScape: Worldwide Extended Detection and Response Software 2025 assessment. Microsoft Defender XDR is highlighted for broad signal coverage across endpoints, identities, email and collaboration, SaaS apps, cloud workloads, and data, plus AI-driven automation and native SIEM integration that consolidate visibility and accelerate response. IDC also cited Microsoft Security Copilot and automatic attack disruption as key differentiators that reduce dwell time and free SOC teams to focus on higher-value tasks.

⚠️ Microsoft is addressing a logic bug in Microsoft Defender for Endpoint that causes some Dell devices' BIOS firmware to be incorrectly marked as outdated, prompting unnecessary update alerts to users. The company says a fix has been developed and is being prepared for deployment, but it has not disclosed the regions or number of customers affected. Microsoft also recently resolved macOS black screen crashes linked to a deadlock in the Apple enterprise security framework and has been correcting several anti-spam and machine-learning false positives impacting Teams and Exchange Online.

🔧 Microsoft is investigating a known issue that causes classic Outlook on Windows to crash at launch for some Microsoft 365 customers. The vendor has not provided a public fix; affected customers must open a support case in the Microsoft 365 Admin portal so Exchange Online support can request a service change. Microsoft notes the error can stem from different causes but recent cases have involved user mailboxes, and it recommends capturing a Fiddler trace for triage. Temporary workarounds include using new Outlook for Windows or Outlook Web Access until mitigation is applied.

📌 Microsoft will automatically install the Microsoft 365 companion apps on Windows 11 devices that have the Microsoft 365 desktop apps, beginning in late October 2025 and completing by the end of December 2025. The suite — People, Files, and Calendar — integrates Copilot for contextual AI assistance from the taskbar. IT admins can opt out via the Microsoft 365 Apps admin center or disable app auto‑launch in each app's Settings.

🔐 As Cybersecurity Awareness Month begins, Microsoft emphasizes that cybersecurity is both a personal and organizational responsibility. The post spotlights the Microsoft Secure Future Initiative (SFI), which has mobilized more than 34,000 engineers to reduce risk and implement protections such as phishing-resistant multifactor authentication on 100% of production system accounts and 92% of employee productivity accounts. It highlights new resources — including the Be Cybersmart Kit and SFI patterns and practices — plus learning paths, scholarships, and programs to help organizations and students improve security skills.

🤖 The Microsoft Agent Framework is now in public preview inside Azure AI Foundry, offering an open-source SDK and runtime to simplify orchestration of multi-agent systems. Developers can prototype locally and deploy with built-in observability, durability, and compliance while integrating tools via OpenAPI, Agent2Agent (A2A), and the Model Context Protocol (MCP). Microsoft also previews stateful multi-agent workflows and has contributed multi-agent tracing standards to OpenTelemetry. Responsible AI controls and a generally available Voice Live API add governance and real-time voice capabilities for enterprise scenarios.

⚠️ Microsoft has confirmed that the Windows 11 Media Creation Tool (version 26100.6584), released on September 29, 2025, may not run on devices with Arm64 processors after the Windows 11 25H2 rollout. Affected users report an error that reads, "We're not sure what happened, but we're unable to run this tool on your PC," blocking creation of bootable installation media. Microsoft says the tool does not support creating media for Arm64 devices and that the normally available ability for Arm64 systems to produce x64 media is also failing. As a temporary workaround, Microsoft recommends using a PC with an AMD64 processor to create installation media while it investigates and prepares a fix.

ℹ️ Windows 11 25H2 (2025 Update) is now generally available. The minor release shares the same platform as 24H2 and is rolled out gradually, with devices on 24H2 updated via small enablement packages (<200 KB) while systems on 23H2 receive a full OS swap. Enterprise-focused changes include Wi‑Fi 7 support, improved vulnerability detection, and an optional Group Policy to remove select preinstalled Store apps. Microsoft also removed legacy tools such as PowerShell 2.0 and WMIC.

🔧 Microsoft says it has partially resolved an issue that caused DRM-protected video playback failures on Windows 11 24H2 systems after the August preview update (KB5064081) or later. Affected applications using Enhanced Video Renderer with HDCP enforcement or DRM for digital audio experienced freezes, black screens, and copyright protection errors. The September preview update KB5065789 contains fixes, though Microsoft warns some audio DRM problems may continue for certain applications.

🔒 Microsoft announced the general availability of the Sentinel data lake and public previews of Sentinel Graph and the Sentinel Model Context Protocol (MCP) server. The release broadens Sentinel from a traditional SIEM into a unified, agentic security platform designed to ingest and correlate structured and semi-structured signals at scale. It is intended to give AI agents such as Security Copilot and developer tools in VS Code with GitHub Copilot richer contextual access for detection, retroactive hunting, and automated response while integrating with Defender and Purview.