M365 Message Center

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19.03.2026

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Microsoft 365 apps · Microsoft Purview

Updated March 19, 2026: We have updated the timeline. Thank you for your patience. Office for the web in Microsoft 365 now supports applying sensitivity labels with user-defined permissions. This enhancement provides organizations with greater flexibility and control over document access in Word, Excel, and PowerPoint for the web.This feature will only be available in tenants that have enabled coauthoring on files encrypted with sensitivity labels: Enable co-authoring for files encrypted with sensitivity labels This message is associated with Microsoft 365 Roadmap ID 468888. When this will happenGeneral AvailabilityWorldwide and GCC: We will begin rolling out in mid-April 2026 (previously mid-March) and expect to complete by early May 2026 (previously early April).GCCH and DoD: We will begin rolling out in mid-April 2026 (previously mid-March) and expect to complete by early June 2026 (p

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17.03.2026

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Microsoft Teams

Updated March 17, 2026: We have paused rollout of this feature at this time and will provide updates via this post when we are ready to proceed. We apologize for any inconvenience. IntroductionWe’re excited to announce that Microsoft Teams now supports apps in Private channels. This update enables richer collaboration scenarios across teams and organizations by allowing users to add and use apps—including bots, tabs, and message extensions—directly within Private channels. This change aligns with customer feedback requesting more consistent and flexible app experiences across collaboration spaces. Support for apps in Private Channels follows the same model as that for shared channels, ensuring a unified experience for users and developers. This message is associated with Roadmap ID 518215 and applies to Teams for Windows desktop and Teams for Mac desktop. When this will happen: Targeted

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16.03.2026

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Microsoft Copilot (Microsoft 365) · Microsoft 365 Copilot Chat

Updated March 16, 2026: We have updated the timeline. This feature will be enabled for en-US only initially. Thank you for your patience. [Introduction:] Read Aloud is evolving from a passive listening tool into an interactive experience. By integrating Copilot Q&A, users can now ask questions and refine their understanding of document content in real time—without interrupting their workflow. This enhancement supports accessibility, improves comprehension, and helps users stay focused while gaining insights faster.A Microsoft 365 Copilot license is required to use this feature.This message is associated with Microsoft 365 Roadmap ID 523205. [When this will happen:] General Availability (Worldwide): Rollout will begin in early February 2026 (previously early January) and is expected to complete by early July 2026 (previously early March). [How this affects your organization:] Who is affec

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13.03.2026

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SharePoint Online

Updated March 13, 2026: We have updated the timeline. Thank you for your patience. We’re improving SharePoint Online security via Content Security Policy (CSP) enforcement. Currently CSP is applied in reporting mode but as of March 1, 2026, the Content Security Policy will be enforced which will prevent the loading of script (e.g. JavaScript) from non-allowed sources. This message center post replaces MC1055557 (April 2024).This change is associated with Microsoft 365 Roadmap ID: 485797[When this will happen:]This will be implemented starting March 1, 2026 and should complete by March 20, 2026. [How this will affect your organization:]If your organization extended SharePoint Online using SPFx then the created custom SPFx solutions could potentially load scripts from locations which are not allowed. In most cases SPFx solutions use and load script from allowed locations, but that’s not al

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13.03.2026

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Microsoft Teams

Updated November 24, 2025: This change is currently on hold. We will communicate via Message center when we are ready to proceed. We apologize for any inconvenience this may have caused and thank you for your patience. We’re introducing a new sign-in experience that enhances flexibility and accessibility for a limited number of users on Microsoft Teams for the web. This change introduces new sign-in options—Continue with Apple and Continue with Google—on the sign-in page (teams.microsoft.com or teams.com) for users routed through login.microsoftonline.com/common.NOTE: These options are intended for consumer Microsoft accounts and may be visible to both consumer and enterprise users, depending on your authentication configuration. [When this will happen:] Preview, General Availability: We will update this Message center post when we are ready to proceed.[How this will affect your organiza

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09.03.2026

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Microsoft Copilot (Microsoft 365)

Updated March 9, 2026: We have updated the timeline. Thank you for your patience. Microsoft is introducing a new capability in Teams that enables Channel Agent to orchestrate tasks with select third-party Model Context Protocol (MCP) servers, including GitHub, Asana, and Atlassian (JIRA). This integration supports collaborative workflows that reflect real human teamwork, allowing agents to transparently reason through tasks and gather information across tools. This change helps reduce manual switching between apps and improves task completion efficiency—all within the familiar Teams environment.A Microsoft 365 Copilot license is required to use this feature.This message is associated with Microsoft 365 Roadmap ID 515466. When this will happen Targeted Release (Worldwide): Begins in mid-November 2025 and is expected to complete by end of July 2026 (previously late January). How this affec