(Updated) Microsoft Entra ID: Passkey support for B2B users
MC1459133
Microsoft Entra ID now supports passkey registration and sign-in for B2B users, closing the gap for resource tenant MFA with phishing-resistant options.
Services: Microsoft Entra
Microsoft 365 Message Center posts
Every post with a one-line AI summary, AI tags and an attention level, so you can see what needs you first. How this works
Showing 101–137 of 137 posts in October 2026
Summaries, tags and attention levels are generated by Azure OpenAI from each post’s text and can be wrong. About the AI fields
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Microsoft Defender for Office 365: Post-delivery protection for malicious QR codes in Microsoft Teams
MC1490905
Microsoft Teams URL protection in Defender for Office 365 will now detect and respond to malicious URLs found in QR codes, enhancing post-delivery protections and visibility for security teams.
Services: Microsoft Defender XDR
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Interim guidance for Manitoba time zone changes
MC1490598
Manitoba moves to UTC-5 permanently. Windows will release a fix in October 2026 to add (UTC-05:00) Manitoba. Apply update before November 1, 2026 to avoid incorrect device time.
Services: Windows
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Microsoft Create: Improved sharing controls for Brand Kits
MC1489926
Improved sharing controls for Brand Kits in Microsoft Create allow owners to modify user access between view/edit or remove access after sharing.
Services: Microsoft 365 apps
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(Updated) Microsoft Teams: Multi-line call history tabs in the Calls app
MC1484013
Microsoft Teams is redesigning call history for Teams Phone users with multi-line calling, organizing activity by phone line in dedicated tabs to simplify navigation.
Services: Microsoft Teams
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(Updated) Microsoft Teams: QR code protection for messages from external users
MC1470410
Microsoft Teams will blur QR code images sent by external users in messages to reduce phishing risks; users can reveal images if trusted.
Services: Microsoft Teams
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Microsoft OneDrive and SharePoint: Generate smart tables of contents for PDFs on the web with Copilot
MC1486295
Smart TOC in OneDrive and SharePoint PDF viewer lets Copilot-licensed users generate an AI-powered clickable table of contents for PDFs on the web, aiding navigation.
Services: SharePoint Online, Microsoft OneDrive, Microsoft Copilot (Microsoft 365)
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Microsoft Teams: Breakout room support for Teams Rooms on Android
MC1488847
Breakout room support is being added to Microsoft Teams Rooms on Android, enabling organizers to assign and move these devices between breakout rooms and the main meeting room.
Services: Microsoft Teams
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(Updated) Microsoft Teams: Modernized Gallery view in Teams Rooms on Android
MC1446797
Modernized Gallery view for Teams Rooms on Android improves participant visibility, consistent layouts, and meeting controls for users and admins, aligning with Teams Rooms on Windows.
Services: Microsoft Teams
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(Updated) Outlook (new): Right-click to customize the classic ribbon
MC1485120
Classic ribbon customization is now available in New Outlook for Windows and Outlook on the Web, letting users personalize Home and View tabs by right-clicking the ribbon.
Services: Exchange Online
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An updated version of the September 2026 Scan Cab is available
MC1486397 Major change
An updated September 2026 Scan Cab is available for Exchange Server; it includes metadata for new updates and addresses CVE-2026-96940. Admins must re-deploy if they downloaded before 6:30 PM PDT on Oct 2, 2026.
Services: Windows
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Dynamics 365 Contact Center - Use role-based enforcement for recording and transcription downloads
MC1485169
Role-based enforcement for recording and transcription downloads in Dynamics 365 Contact Center enables admins to block downloads via new Dataverse roles, effective October 31, 2026.
Services: Dynamics 365 Apps
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Microsoft Entra App Gallery: Self-service onboarding for new applications
MC1485054
Self-service onboarding for new Microsoft Entra App Gallery applications enables ISVs and admins to validate SSO/user provisioning integrations and manage submissions via a guided workflow.
Services: Microsoft Entra
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Microsoft Agent 365: Expanded access to Microsoft agent usage and activity insights in Microsoft 365 admin center
MC1506727
Agent 365 license is no longer required for observability data on supported Microsoft-built agents in Microsoft 365 admin center, expanding access to usage/activity metrics for admins.
Services: Microsoft 365 suite
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Microsoft Purview Audit: AuditLogQuery API generally available and Search-UnifiedAuditLog retiring
MC1505599
Microsoft Graph AuditLogQuery API is now generally available for accessing Purview Audit logs; Search-UnifiedAuditLog cmdlet will retire on October 15, 2027.
Services: Microsoft Purview
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Microsoft Defender Vulnerability Management: Private preview for selected developer package vulnerability coverage
MC1490909
Defender Vulnerability Management expands CVE coverage to curated Node.js, Python, and Java packages on Windows devices, affecting vulnerability workflows and integrations.
Services: Microsoft Defender XDR
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(Updated) Agents and Skills in CIQ
MC1479519
Users can now insert Agents and Skills directly into prompts via CIQ menu or using @ and /, making context-specific AI capabilities easier to access for improved productivity.
Services: Microsoft Copilot (Microsoft 365)
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Microsoft Dataverse - Bulk generate prompt column values for existing records (backfill)
MC1488488
Bulk generation of AI-prompt column values for existing Dataverse records now enabled, consuming Copilot/AIB credits; admins must configure environment settings before use.
Services: Microsoft Dataverse
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Prompt Column backfill
MC1486292
Prompt columns can now generate AI values for existing records, enabling bulk backfill of historical data in Dataverse tables without manual updates.
Services: Power Apps in Microsoft 365
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Build apps in Microsoft Copilot Studio and Copilot Cowork
MC1469329
Preview of app-building in Copilot Cowork and Copilot Studio lets users create, refine, and publish apps via natural language and generative AI; admins get governance, billing, and visibility controls.
Services: Power Platform, Microsoft Copilot (Microsoft 365), Microsoft 365 Copilot Chat, Microsoft Copilot (Power Platform)
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Dynamics 365 and Power Platform– Information about storage validation for Dataverse-only tenants
MC1483511
A Data Privacy message is available in Message Center for your organization; access it via Admin Center as a Global Admin or Privacy Reader.
Services: Dynamics 365 Apps, Power Platform
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(Updated) Microsoft Teams: Channel agent orchestration with GitHub, Asana, and Jira via Model Context Protocol (MCP)
MC1182703
Teams Channel Agent can now orchestrate tasks with MCP servers (GitHub, Asana, Jira) for improved cross-tool collaboration; requires a Microsoft 365 Copilot license.
Services: Microsoft Copilot (Microsoft 365)
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Microsoft 365 Copilot in PowerPoint: 'Clarify my thinking' skill for desktop
MC1492161
Microsoft 365 Copilot in PowerPoint adds the 'Clarify my thinking' skill, enabling users to request feedback to sharpen ideas and improve presentations.
Services: Microsoft 365 apps, Microsoft Copilot (Microsoft 365)
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Microsoft 365 Copilot in PowerPoint: 'Clarify my thinking' skill for web
MC1492160
Microsoft 365 Copilot in PowerPoint adds the 'Clarify my thinking' skill for web, enabling users to get AI-driven feedback to refine presentations.
Services: Microsoft 365 apps, Microsoft Copilot (Microsoft 365)
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Microsoft 365 Copilot in PowerPoint: 'Clarify my thinking' skill for Mac
MC1492159
Microsoft 365 Copilot in PowerPoint introduces the built-in Clarify my thinking skill for Mac, allowing users to refine their presentations with AI-powered feedback.
Services: Microsoft 365 apps, Microsoft Copilot (Microsoft 365)
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'Record A Skill' Capability in PowerPoint Copilot
MC1490903
Copilot for PowerPoint now supports Record a Skill, letting users record actions to create reusable workflows for recurring presentation tasks.
Services: Microsoft 365 apps, Microsoft Copilot (Microsoft 365)
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Dynamics 365 Project Operations - Assign task level calendar for precise planning
MC1489590
Task level calendar assignment for precise planning in Dynamics 365 Project Operations will be generally available September 30, 2026.
Services: Dynamics 365 Apps
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Microsoft Word for Android: Agent Mode
MC1488843
Copilot Agent Mode is coming to Word on Android, enabling users to draft and refine content with task-oriented AI directly on mobile devices.
Services: Microsoft 365 apps, Microsoft Copilot (Microsoft 365)
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Microsoft Power Platform governance and administration - Secure Dataverse record with column-based filtering
MC1486027
Admins can now use filtered views for secure record-level access based on field values in Power Platform governance, supporting scenarios without ownership. Public preview starts October 2, 2026.
Services: Power Platform
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Updates available for Microsoft 365 Apps for all channels
MC1506982
Microsoft 365 Apps updates are rolling out to Current, Monthly Enterprise, and Semi-Annual Enterprise channels starting October 13, 2026.
Services: Microsoft 365 apps
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Manage Administrator protection within Windows 11 security baseline
MC1506291
Administrator protection will be enabled by default in Windows 11 security baselines with the October 2026 security update for versions 26H2, 25H2, and 24H2.
Services: Windows
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Hardening changes for ReFS volumes on removable media
MC1506290
Microsoft is improving Windows security by hardening ReFS, adding visibility and controls to block unsupported external ReFS configurations; phased rollout allows audit review and dependency assessment.
Services: Windows
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AD FS Distributed Key Manager (DKM) container ACL hardening begins today
MC1506287
Automatic remediation of insecure AD FS Distributed Key Manager container ACLs starts with October 2026 Windows security update to address CVE-2026-56155.
Services: Windows
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Notice: The October 2026 Scan Cab for Microsoft updates is delayed
MC1506286
The Scan Cab for the October 2026 Microsoft security updates is delayed and has not been released; updates on availability will be communicated.
Services: Windows
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Prepare for Windows Update certificate rotation in 2027
MC1491763
Devices must have replacement certificates (delivered via Windows updates) to maintain access to Windows Update after certificates expire on May 17 and June 19, 2027.
Services: Windows
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(Updated) Microsoft Outlook: Link preview retirement
MC1479516
Link Preview has been retired in new Outlook for Windows and Outlook on the web due to deprecation of the browser service needed for preview content.
Services: Exchange Online
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Updates available for Microsoft 365 Apps for Current Channel
MC1489691
Microsoft 365 Apps Current Channel update is rolling out from October 6, 2026; managed clients can download and deploy the latest update.
Services: Microsoft 365 apps