Message center announcements
December 15, 2025 – December 21, 2025
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(Updated) Microsoft Teams: Private channels increased limits and transition to group compliance
MC1134737 | December 19 – Microsoft Teams is updating private channels by increasing limits to 1000 channels per team and 5000 members per channel, enabling meeting scheduling, and shifting compliance policies from user mailboxes to team group mailboxes. Migration runs from October 2025 to January 2026; admins must update compliance policies before then.
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(Updated) Retirement of several Microsoft Planner features in early 2026 as part of a Planner update
MC1193421 | December 19 – In early 2026, Microsoft Planner will roll out a major update with new features like task chats and custom templates, while retiring features such as the old task comments, whiteboard tab for premium plans, Planner component in Loop, Viva Goals integration, and iCalendar feed. Some features will be temporarily unavailable.
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Outlook: New and improved People Hub on Web
MC1199768 | December 18 – The new Outlook Web People Hub offers a modern multi-column layout, faster search, automatic duplicate linking, and enriched contacts with organizational data. Rolling out from January to March 2026, all users will be auto-migrated to this improved experience with no admin action needed.
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Learning Activities now available in Microsoft 365 Education and Copilot
MC1199766 | December 18 – Learning Activities is now available in Microsoft 365 Education and Copilot, enabling educators and students to create interactive practice tools like flashcards from existing content. It rolled out worldwide by December 2025, is enabled by default for eligible licenses, and can be disabled by admins if desired.
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Take Action: Out-of-band update to address MSMQ service issues leading to queue operations and resource-related errors
MC1199746 | December 18 – Microsoft has identified an issue affecting Message Queuing (MSMQ) functionality in some enterprise environments after installing the December 2025 Windows security update (released December 9, 2025). Individuals using Windows Home or Pro editions on personal devices are very…
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(Updated) New enrollment dashboard and data deletion controls in Teams Admin Center
MC1191921 | December 18 – A new voice and face enrollment dashboard with data deletion controls will roll out in Teams Admin Center from February to March 2026, allowing admins to view and permanently delete user enrollment data without changing default enrollment policies. No action is needed to enable this feature.
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(Updated) Copilot can now automatically reschedule 1:1 meetings and personal events based on your preferences
MC1184999 | December 17 – Copilot now automatically reschedules 1:1 meetings and personal events based on user preferences to resolve conflicts. Available to Copilot-licensed users, it detects double bookings and moves flexible events. Rollout starts mid-November 2025, completing by mid-January 2026, requiring no admin action.
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(Updated) Cancelled: Loop app grace period is ending
MC1184645 | December 16 – The planned end of the Loop app grace period in December 2025 has been cancelled. Users without qualifying Microsoft 365 plans will continue their current Loop workspace capabilities. No immediate action is required, but organizations may review licensing and update support resources accordingly.
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(Updated) Exchange Online ActiveSync device support update
MC1197103 | December 16 – Starting March 1, 2026, Exchange Online will block devices using Exchange ActiveSync versions below 16.1 for improved security. Organizations must update mobile devices and apps to EAS 16.1 or higher. Outlook Mobile is unaffected. Admins can identify outdated devices using a provided PowerShell command.
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(Updated) Microsoft 365 Copilot: Prepare for your meeting with Copilot chat in Outlook mobile
MC1182702 | December 16 – Outlook mobile users with a Microsoft 365 Copilot license can prepare for meetings using Copilot chat on Android and iOS. The feature, rolling out worldwide from mid-January to mid-February 2026, is on by default and requires no admin setup. It uses AI to provide personalized meeting info.
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Express voice enrollment in Microsoft Teams
MC1197146 | December 15 – Express voice enrollment in Microsoft Teams enables quick voice profile registration for enhanced meeting features. It rolls out to enterprise tenants (excluding EDU) starting February 2026, is on by default, and can be managed by admins via PowerShell. Organizations should review policies and communicate changes accordingly.
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Retirement of featured links on SharePoint Start Page
MC1197131 | December 15 – The Featured Links feature on the SharePoint Start Page will be retired from March to June 2026 due to low use. Admins will lose access, and existing links will be removed. Alternatives include global navigation links and Viva Connections Resources. Organizations should plan and communicate this change.
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(Updated) Update to EWS Access for Kiosk / Frontline Worker Licenses
MC1191578 | December 15 – Starting June 30, 2026, EWS access will be blocked for mailboxes licensed only with Exchange Online Kiosk, Microsoft 365/Office 365 F1, or F3. To maintain EWS access, users must be assigned licenses with EWS rights, such as Exchange Online Plan 1/2 or Microsoft 365 E3/E5.
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Deprecation of Designer bot and Designer banners in Teams
MC1197104 | December 15 – The Designer bot and Designer banners in Microsoft Teams will be retired between mid-January and February 27, 2026. Users can no longer use these features but can generate images via Copilot in Teams. No admin action is needed; notify users and update documentation accordingly.
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(Updated) Realtime voice is now available in M365 Copilot Chat and M365 Copilot
MC1085684 | December 15 – Realtime voice chat is now available in Microsoft 365 Copilot, enabling hands-free, natural interaction. Rolling out globally from September 2025 to January 2026, the feature is on by default with no admin setup needed. Users can start voice conversations via an icon in the input box across devices.
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Teams admin center: Auto‑updates for Teams Android device firmware and apps will be paused during year‑end holidays
MC1200581 | December 19 – Auto-updates for Teams Android device firmware and apps via Teams admin center will pause from December 20, 2025, to January 12, 2026, to ensure holiday stability. Manual updates remain available. Updates will resume post-holiday with standard rollout logic; no action is needed before the pause.
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Microsoft Purview | Insider risk management- Insider risk management for risky agents
MC1200579 | December 19 – Microsoft Purview Insider Risk Management will extend to detect and manage risky AI agent activities in enterprise environments. Features include integration with Copilot Studio and Azure AI Foundry, AI-specific risk policies, and governance of agent workflows. Public preview starts December 2025; general availability by December 2026.
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OpenAI’s GPT-Image-1.5 model is now available in Microsoft 365 Copilot
MC1200577 | December 19 – Microsoft 365 Copilot will replace GPT-4o with OpenAI’s GPT-Image-1.5 from mid-December 2025 to late January 2026, enhancing image generation quality, speed, and accuracy without changing admin controls or compliance settings. Eligible users receive the update automatically.
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Teams admin center: Messaging safety defaults changing to “On” by default
MC1200576 | December 19 – Starting January 12, 2026, Microsoft Teams will enable messaging safety features by default, including weaponizable file type protection, malicious URL protection, and reporting incorrect detections. Existing custom settings remain unchanged. Admins should review and adjust settings before this date and inform helpdesk staff accordingly.
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Chat history landing page: Filtering UI refresh
MC1200572 | December 19 – The Chat History landing page filtering UI will be refreshed by consolidating filters into a single “filter pill” for easier management and clearing. This update, rolling out globally in January 2026, affects all users with no functional changes. No admin action is needed, but communication and documentation updates are recommended.
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(Updated) Microsoft Exchange Online: New Message Trace will be GA; legacy Message Trace will retire
MC1092458 | December 19 – The new Message Trace in Exchange Online is generally available, replacing legacy cmdlets and UI starting September 1, 2025. The legacy tools will be supported in parallel for months, with full deprecation by March 18, 2026. Admins should update scripts and begin using the new experience.
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Microsoft Defender for Office 365: Admins can block external users in Microsoft Teams from Defender Portal
MC1200058 | December 19 – Admins can now block external users in Microsoft Teams via the Tenant Allow/Block List in the Microsoft Defender portal, controlling access and communications. This feature, rolling out January 2026, supports up to 4,000 domains and 200 emails, with audit logging and no impact on existing Teams settings.
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(Updated) Microsoft dark themes for SharePoint sites
MC1187401 | December 19 – Two new Microsoft-designed dark themes (Dark Teal, Dark Blue) will be available for SharePoint sites starting early 2026. These themes enhance visual experience, support accessibility, and can be applied via site settings without affecting existing themes or functionality. No admin action is needed before rollout.
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(Updated) Microsoft Teams: Upcoming improvements to the jump list experience on Windows
MC1184652 | December 19 – Microsoft Teams on Windows will update the jump list by mid-February 2026, adding meeting access, scheduling, and chat actions, while removing the “Quit” option. These changes improve efficiency and require no user action but may need helpdesk and documentation updates.
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(Updated) Microsoft Purview | Information Protection: Sensitivity label grouping modernization
MC1111778 | December 18 – Microsoft Purview is modernizing sensitivity labels by simplifying them into labels and label groupings for easier management. Manual migration via a wizard is available for some tenants; others will be auto-migrated by January 2026. Users won’t see changes, and admins can adjust labels post-migration. No action needed before rollout.
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Microsoft Teams: Select multiple messages to forward
MC1199767 | December 18 – Microsoft Teams will introduce Multi-Select Forward, allowing users to forward up to five messages together in one bundled message on desktop and web starting January 2026. Mobile users can view but not forward multiple messages. The feature is on by default, requiring no admin action.
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Microsoft Purview: Role management update
MC1199765 | December 18 – Microsoft Purview will map certain admin roles to new Microsoft Entra roles to enhance security and synchronize permissions automatically by March 2026. High-privileged Purview roles will correspond to three Entra roles, with no customer action needed. Do not assign these roles directly in Entra.
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Microsoft Purview | Data Security Investigations – Introducing new purge mitigation action
MC1199763 | December 18 – Microsoft Purview Data Security Investigations will add a new purge mitigation action by early 2026, allowing admins to delete sensitive or overshared content during investigations. Enabled by default, it respects existing policies and requires no prior admin action. Security teams should be informed and documentation updated accordingly.
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(Updated) Microsoft Teams town halls: Full HD (1080p) video resolution coming to Teams Premium
MC1178507 | December 18 – Microsoft Teams Premium will support 1080p video resolution for town halls starting targeted release in November 2025 and general availability in January 2026. IT admins must enable it via policy, ensure network support, and use Ultra-Low Latency and Microsoft eCDN for optimal performance.
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(Updated) Announcing the new pay-as-you-go experience in Microsoft 365 Admin Center
MC1186367 | December 17 – Microsoft 365 Admin Center introduces a new pay-as-you-go experience for managing Backup and Copilot billing starting January 15, 2026. Admins can create billing policies, set budgets, and view usage under the Billing node. Migration details for existing Backup customers will be announced later. No immediate action required.
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(Updated) Microsoft 365 Copilot: New ways to include files and emails as part of prompts in chat web scope
MC1139488 | December 17 – Microsoft 365 Copilot Chat now lets users include files and emails in prompts by typing ‘/’ in the web chat prompt box, improving response relevance. Email access is limited to Outlook. Rollout starts October 2025, completing January 2026. No admin action is needed; users see only accessible content.
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(Updated) Microsoft 365 Copilot Chat: New ways to include files and emails in prompts
MC1139489 | December 17 – Microsoft 365 Copilot Chat now lets users include files and emails in prompts by typing ‘/’ in the prompt box, enhancing response relevance. Email access is limited to Outlook. Rollout begins October 2025, completing by January 2026. No admin action is needed; users see only accessible content.
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(Updated) Facilitator agent to be generally available in Teams meetings
MC1155927 | December 17 – The Facilitator agent, powered by AI and included with Microsoft 365 Copilot licenses, is now generally available in Teams meetings. It helps organize agendas, track tasks, and create documents in real time. Users can enable it per meeting; admins can control its availability. Rollout completes by January 2026.
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Microsoft 365 Copilot: Nine new connectors now generally available
MC1198705 | December 17 – Nine new Microsoft 365 Copilot connectors are now generally available, enabling integration with GitHub, Freshservice, Guru, Dropbox, Google Drive, Zendesk, and Amazon S3. These connectors allow users to search, retrieve, and interact with external enterprise data across Microsoft 365 apps immediately.
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Microsoft SharePoint Online: Email customization for site access review from Data Access Governance reports
MC1198704 | December 17 – SharePoint admins can customize emails sent from Data Access Governance reports for site access reviews starting mid-December 2025. This optional feature aims to improve email engagement and response rates without changing existing policies. Admins should update documentation and notify relevant teams accordingly.
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Microsoft Outlook: Wait on Send for Data loss Prevention
MC1198702 | December 17 – New Outlook for Windows will support Wait on Send for Data Loss Prevention, blocking email sending until DLP evaluation completes or timeout occurs. This feature is disabled by default and controlled via Exchange mailbox settings, allowing users to multitask during evaluation with configurable override timing. Available early 2026.
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(Updated) Microsoft Teams: Emojis in section names
MC1166877 | December 17 – Microsoft Teams will support emojis in custom section names starting November 2025 on Desktop and Web, with Mobile support next semester. This feature is on by default, requires no admin action, and helps users visually organize sections. Rollout completes by December 2025 worldwide.
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Microsoft Purview | Data Lifecycle Management: Retention based on “last accessed” for OneDrive and SharePoint files
MC999442 | December 17 – Microsoft Purview will soon enable retention policies based on “last accessed” for OneDrive and SharePoint files, starting preview in late May 2026 and general availability by late June 2026. This feature helps delete obsolete data and improves Microsoft 365 Copilot responses, requiring no admin action before rollout.
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(Updated) Upcoming Change to Teams Desktop Client on Windows
MC1189656 | December 17 – Thank you for the valuable feedback we’ve received. We are currently reassessing the rollout timelines to ensure alignment with your needs and operational requirements. You can expect a formal update from us by mid to late January 2026.
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(Updated) Microsoft 365 Copilot: RSVP to meetings directly in Copilot chat
MC1192258 | December 17 – Microsoft 365 Copilot chat will let users RSVP to meetings directly (Accept, Decline, Tentative, Follow, Remove canceled) starting January 2026. This feature is on by default for licensed users, requires no admin setup, and simplifies meeting management within the chat experience.
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(Updated) Microsoft 365 Copilot: Review PDFs using Copilot context menu and AI actions
MC1192664 | December 17 – Microsoft 365 Copilot will roll out globally from early to late January 2026, enabling faster PDF reviews via a context menu in OneDrive web. It offers “Explain this” and custom prompts for text explanation. A Copilot license is required; no action is needed now.
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(Updated) Microsoft 365 Copilot: Generate text for a PowerPoint slide using slide context
MC1178510 | December 17 – Microsoft 365 Copilot in PowerPoint will enable users to generate titles, summaries, or captions using natural language based on slide context. The feature, requiring a Copilot license, will roll out worldwide from mid-January to mid-February 2026, with no admin action needed before rollout.
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(Updated) Microsoft Viva : News AI audio briefing in Connections Mobile
MC1150671 | December 17 – Microsoft Viva Connections mobile will introduce an AI audio briefing feature providing summaries of top news with playback controls. Available to users with a Microsoft 365 Copilot license, it rolls out from late September 2025 to mid-February 2026, enabled by default with no configuration needed.
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Dynamics 365 Contact Center – Evaluate closed conversations with Quality Evaluation Agent
MC1198596 | December 17 – We are announcing the ability to evaluate closed conversations, generate quality scores, and provide insights to help supervisors improve interaction quality in Dynamics 365 Contact Center. This feature will reach general availability on January 16, 2026.How does this affect me?This feature reviews closed conversations and provides quality scores based on defined evaluation criteria and evaluation plans. Additionally, this feature provides supervisors with full control over…
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Migrate User Data Across Tenants: Mailboxes, OneDrives, and Teams Chats
MC1198079 | December 16 – Starting early December 2025, admins can opt-in to a unified interface with new PowerShell Graph commands to migrate Exchange mailboxes, OneDrive files, and Teams chats across Microsoft 365 tenants, simplifying tenant-to-tenant migrations during organizational changes. No action is required unless used.
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Microsoft Purview | Data Loss Prevention – Mac device and device group based policy scoping support for Endpoint DLP
MC1198078 | December 16 – Microsoft Purview Endpoint DLP will support scoping policies to specific macOS devices or device groups starting late December 2025. This allows admins more granular control without changing existing policies unless configured. Requires tenant version 101.25072 or higher. No compliance issues identified.
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Microsoft Entra: Cross-tenant security group synchronization
MC1198077 | December 16 – Microsoft Entra introduces cross-tenant security group synchronization, enabling centralized management and shared access across tenants. Public Preview starts late January 2026; general availability in late April 2026. Admins must opt in and configure attribute mappings and access policies. No compliance issues identified.
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Site attestation policy is now generally available
MC1198075 | December 16 – Site attestation policy is now generally available, enabling SharePoint admins to require site owners to periodically verify site ownership, membership, and sharing settings. This helps reduce compliance risks and prevent oversharing. The feature is off by default and requires admin setup with configurable enforcement actions.
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Updates available for Microsoft 365 Apps for Current Channel
MC1198067 | December 16 – We’ve released updates to the following update channel for Microsoft 365 Apps: Current Channel
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(Updated) Copilot Pages: New feature—M365 Copilot Chat can now answer questions about the currently open page
MC1173931 | December 16 – M365 Copilot Chat will soon answer questions about the currently open Copilot Pages content, enhancing workflow by providing contextual answers side-by-side. Rolling out worldwide from October 2025 to February 2026, the feature is on by default and respects existing admin policies.
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(Updated) Microsoft 365 Copilot: Declarative agents model upgrade to GPT-5.1
MC1194070 | December 16 – Microsoft 365 Copilot declarative agents will upgrade to the GPT-5.1 model with an auto architecture, rolling out worldwide from early January to mid-January 2026. The advanced reasoning model will handle complex queries, enabled by default with no admin changes or required user action.
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Power Platform admin center – Review security role descriptions and definitions
MC1197917 | December 16 – We are announcing the ability for admins to view security role information inside the Power Platform admin center. This feature will reach general availability on January 16, 2026. How does this affect me?With this feature, admins can view the description of the Microsoft Dataverse security roles, see which apps the security role applies to, and view the respective core table privileges in the Power Platform admin center.What action do I need to take?While…
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Microsoft Purview compliance portal: Purview Information Protection | Classifier Simulation Mode (Health Monitoring)
MC1185445 | December 16 – Microsoft Purview introduces Classifier Simulation Mode to test custom classifiers on production data before publishing, reducing false positives and improving performance. Available from early 2026, it provides health insights in the compliance portal, allowing admins to monitor, simulate, and optimize classifiers with role-based access control.
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(Updated) Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains
MC1133508 | December 16 – Microsoft Teams now integrates with Microsoft Defender for Office 365 Tenant Allow/Block List, enabling security admins to centrally manage blocked external domains in Teams. This feature, available with Defender Plan 1 or 2, blocks communications from specified domains, supports audit logging, and requires Teams admin enabling.
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(Updated) New in Teams – open channels in dedicated windows
MC1162964 | December 16 – Microsoft Teams will enable users to open channels in separate windows for improved multitasking, rolling out worldwide from late October 2025 to late January 2026. This feature is enabled by default for all desktop users, requires no admin action, and does not affect existing functionality or policies.
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(Updated) Microsoft Teams: Enhancements to Interpreter and multilingual meeting experience
MC1188227 | December 16 – Microsoft Teams enhanced its multilingual meeting experience by adding automatic spoken language detection, a “Preparing” status indicator for the Interpreter, and clearer settings explanations. These updates, available to Microsoft 365 Copilot users, roll out December 2025 across multiple platforms with no admin action required.
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(Updated) Book a workspace when creating an event
MC1186361 | December 16 – Users can now book workspaces directly from the location field when creating calendar events, simplifying the process. This feature rolls out globally from mid-January to mid-February 2026, replacing the iOS long-press method. It requires workspace booking enabled by admins and users, with no admin action needed to prepare.
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(Updated) New toolbar customization for multi-select in Outlook Mobile
MC1183297 | December 16 – Outlook Mobile’s multi-select toolbar will be customizable, allowing users to reorder actions like Move to Other, Report Junk, Ignore, Pin, and Snooze for multiple emails. Rollout starts mid-January 2026, completing by mid-February. No admin action or compliance concerns are required.
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(Updated) Microsoft Outlook: New third-party enriched properties available for customizing profile cards
MC1158902 | December 16 – Microsoft will roll out new customizable profile card properties in Microsoft 365 by end of January 2026, allowing admins to add Role, Division, Employee ID, Number, and Cost Center from Microsoft Entra ID or external HR systems via Microsoft Graph connectors. Properties are hidden by default and configurable in admin settings.
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(Updated) SharePoint: OneDrive and SharePoint – recognize text in PDFs
MC1192663 | December 16 – OneDrive mobile apps will gain built-in OCR to make scanned PDFs editable and searchable, rolling out worldwide from early January to early February 2026. The feature is enabled by default, requires no admin action, and helps improve document workflows and content findability.
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(Updated) Microsoft Purview DLP and Edge for Business: Inline data protection for file uploads to unmanaged GenAI apps
MC1183007 | December 15 – Microsoft Purview DLP now offers inline file upload protection in Edge for Business to prevent data leaks to unmanaged GenAI apps. Admins can enforce policies based on file size, type, and sensitivity on Intune-managed Windows devices. Public preview starts late November 2025; general availability begins mid-January 2026.
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(Update)Microsoft Purview DLP and Edge for Business: Inline data security controls for more unmanaged GenAI apps in Edge
MC1182684 | December 15 – Microsoft Purview DLP in Edge for Business will expand inline protections to cover more unmanaged consumer GenAI apps, allowing admins to apply existing policies without extra deployment. Public preview starts late November 2025; general availability begins mid-January 2026. This enhances data security and compliance monitoring on Intune-managed Windows devices.
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(Updated) Microsoft Teams Rooms on Android: Recording and transcription controls (Teams Rooms Pro required)
MC1182688 | December 15 – Microsoft Teams Rooms on Android will allow users with Teams Rooms Pro licensing to start, stop, and restart meeting recording and transcription directly from the device, starting mid-January 2026. Permissions are required for organizer and room accounts, with some limitations on call types and tenant scenarios.
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(Updated) Microsoft Viva Insights: New prompt categories in the Microsoft Copilot Dashboard
MC1092459 | December 15 – Microsoft Viva Insights will add new prompt categories—Ask and find, Catch up, Draft and brainstorm, Other—in the Microsoft Copilot Dashboard by early September 2025 (public preview) and mid-January 2026 (general availability). These updates require no admin action but may need internal communication and documentation updates.
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Chat visibility in the Microsoft 365 Copilot App
MC1197154 | December 15 – Microsoft 365 Copilot app will show Chat in navigation for users blocked by admin policy but restrict access with a notice; ineligible users won’t see Chat and get a pop-up if accessing directly. Rollout starts late January 2026, no admin action required.
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Microsoft Teams: Apps now supported in Private Channels
MC1197145 | December 15 – Microsoft Teams now supports apps in Private Channels, allowing bots, tabs, and message extensions with new governance controls. Rollout starts mid-January 2026. Admins and developers must update policies and apps for Private Channel compatibility, ensuring compliance with data and permission changes at the channel level.
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Calendar Search in M365 Copilot Search
MC1197144 | December 15 – Microsoft 365 Copilot’s Calendar Search lets users quickly find meetings by natural language queries, showing full context like attendees, discussions, files, and follow-ups. Rolling out worldwide from October to December 2025, it respects existing security, compliance, and data governance policies with no extra setup beyond licensing.
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Microsoft Purview | Endpoint Data Loss Prevention – Show customized message or hyperlink for multiple file toast
MC1197142 | December 15 – Microsoft Purview Endpoint DLP will allow admins to add customized messages or hyperlinks in toast notifications triggered by DLP policies. This feature, requiring client version 4.18.25110+, rolls out worldwide from late December 2025 to early January 2026, helping guide users with clear instructions.
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New permissions report available in SharePoint admin center
MC1197128 | December 15 – A new Permissions report in the SharePoint admin center (under Data access governance) will show which sites a user can access, including direct or group-based permissions. Rolling out worldwide from mid-December 2025 to mid-January 2026, it requires no configuration and aids permission reviews.
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(Updated) Microsoft Teams: In channels, the “Shared” tab (formerly the “Files” tab) will have new capabilities
MC1025217 | December 15 – The Teams channel “Files” tab will be renamed “Shared,” combining shared post content and document library files. Rolling out November 2025 to January 2026, it adds views for files and links, with keyword search coming later. No admin action is needed; user notification is recommended.
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