M365 Message Center

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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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10.03.2026

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Microsoft Copilot (Microsoft 365)

Updated March 10, 2026: We have updated the timeline. Thank you for your patience. You can now switch between accounts on the Copilot chat tab on iOS and Android. Simply swipe left to open the left-navigation and select from the list of supported accounts.This message is associated with Microsoft 365 Roadmap ID 490213[When this will happen:]1. General Availability (Worldwide, GCC): We will begin rolling out in early September 2025 (previously early July) and expect to complete by end of May 2026 (previously early February).[How this will affect your organization:]Currently, users are only able to access the Copilot Chat tab with their default account or privacy, even if they have other accounts that support Copilot. With account-switching on iOS and Android, users will be able to access Copilot Chat from other accounts that support Copilot, enabling them to access their chat history and

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09.03.2026

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Exchange Online · Microsoft 365 apps

Updated March 9, 2026: We have updated the timeline. Thank you for your patience. IntroductionWe’re enhancing offline functionality in the new Microsoft Outlook for Windows. This update (Microsoft 365 Roadmap ID 496371) enables users to add file attachments while composing emails offline, improving productivity for those working without an internet connection. When this will happen Targeted Release (Worldwide): Rollout begins in late October 2025 and is expected to complete by late March 2026 (previously late November 2025). General Availability (Worldwide): Rollout begins in early April 2026 (previously early January) and is expected to complete by late April 2026 (previously early February). General Availability (GCC): Rollout begins in early May 2026 (previously mid-February) and is expected to complete by late May 2026 (previously late February).How this affects your organization Use

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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

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03.03.2026

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Microsoft Copilot (Microsoft 365)

Updated March 3, 2026: We have updated the timeline. Thank you for your patience.[Introduction] To help users better prepare for upcoming meetings, Microsoft is enhancing the Up Next card experience in Microsoft 365. A new Prepare button will replace the Join button up to 5 minutes before a meeting starts, offering a one-tap way to access Copilot’s meeting preparation tools. This update supports improved productivity and readiness, aligning with feedback for more proactive meeting support.Screenshot 1: Tap Prepare in Up Next.Screenshot 2: Users can prepare with Copilot Chat. [When this will happen:] General Availability (Worldwide, GCC, GCC High, DoD): Rollout begins April 2026 (previously March) and is expected to complete by end of April 2026 (previously end of March). [How this affects your organization:] Who is affected: Users with a Microsoft 365 Copilot Premium license. What will h