M365 Message Center

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31.03.2026

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Windows

Microsoft has identified an issue affecting installation of the March 2026 Windows non-security preview update on some devices running Windows 11, versions 25H2 and 24H2. While installing the update, the following error might occur: “Some update files are missing or have problems. We’ll try to download the update again later. Error code: (0x80073712)”An out-of-band (OOB) update was released today, March 31, 2026, to address this installation issue. This cumulative OOB update for Windows 11, versions 25H2 and 24H2 (KB5086672) supersedes all previous updates and includes all protections and improvements from the March 2026 Windows security and non-security preview updates, as well as this installation fix.Devices running Windows 11, versions 25H2 and 24H2 with Get the latest updates as soon as they’re available turned on may see this update offered automatically through Windows Update when

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31.03.2026

Services

Windows

(Updated 3-31-2026: The March 2026 Windows non-security preview update has been replaced with out-of-band update KB5086672 for Windows 11, versions 25H2 and 24H2. The Windows 11 links in this message have been updated to reflect this change.)The March 2026 non-security preview update is now available for Windows 11, versions 26H1, 25H2, and 24H2. Information about the contents of this update is available from the release notes, which are accessible from the Windows 11 update history page. To learn more about the different types of monthly quality updates, see Windows monthly updates explained.Looking to explore upcoming features and improvements in Windows 11? Check out the Windows roadmap. It includes what’s coming to the Windows Insider Program, what’s gradually rolling out, and what’s generally available.Highlights for the Windows 11, version 25H2 update: Narrator now provides rich im

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27.03.2026

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Microsoft 365 apps

Updated March 27, 2026: We have updated the timeline. Thank you for your patience. [Introduction]We are updating the entry points for Copilot in Word to provide a clearer, more consistent, and more intuitive experience. These changes unify how users access Copilot and introduce Word Agent in the chat pane as the primary Copilot interface. This update improves discoverability, simplifies the user workflow, and creates consistency with other Microsoft 365 apps.[When this will happen]General Availability (Worldwide): We will begin rolling out in early April 2026 (previously late March) and expect to complete by June 2026 (previously late April).General Availability (GCC, GCCH and DoD): We will begin rolling out in October 2026 (previously late March) and expect to complete by late October 2026 (previously late April).[How this affects your organization]Who is affectedAll users of Microsoft

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26.03.2026

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Microsoft Teams

[Introduction] Microsoft Teams is retiring CAPTCHA for meeting join to improve accessibility, reduce join friction, and modernize protections against automated participants. This change follows the release of a new, default‑on capability that detects external meeting assistant bots and provides organizers with increased visibility and control during the meeting join process, as previously announced in Message Center post MC1251206 (Microsoft 365 Roadmap ID 558107). To ensure a smooth transition:The new bot detection capability will be released and available to customers before CAPTCHA deprecation occurs.There will be no gap where meetings are left without baseline bot protection.CAPTCHA will be removed from meeting join flows and admin surfaces only after the new capability is fully in place. [When this will happen] Early May 2026: The Require verification by participants (CAPTCHA) polic

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26.03.2026

Services

Windows

Secure Boot certificates begin expiring in June 2026, and IT admins should take action now to help ensure devices remain secure. Timely deployment of updated certificates is essential to preserving device startup integrity and avoiding servicing (i.e., updates) disruptions.New guidance has recently been published to support a range of deployment scenarios. Whether your organization manages certificates through Microsoft Intune, Group Policy, or manual processes, the resources below provide detailed steps, recommended practices, and troubleshooting guidance to help you plan your updates:Updates and announcements – This page consolidates ongoing updates, milestones, and rollout status changes for the deployment of new Secure Boot certificates across Windows devices. Use it to stay current on important servicing communications as the deployment progresses.Sample Secure Boot E2E Automation

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25.03.2026

Services

Microsoft Teams

Updated March 25, 2026: We have updated the content. Thank you for your patience. [Introduction]We are resurfacing MC670435, published September 2023 to remind admins of the Microsoft Teams Premium self-service trial capability. This message serves as a reminder as we begin a broader rollout of the feature announced in 2023. As we expand rollout and introduce additional entry points for this feature, we want to ensure continued awareness and readiness. [When this will happen:]Ongoing rollout. [How this will affect your organization:]When rolled out, users within your organization will be able to directly initiate a Teams Premium trial. These self-service trial licenses will be a part of your Microsoft organizational tenant, and you will be able to manage these licenses like other Microsoft subscriptions. You will be able to cancel these trial licenses at any time.If you choose to disable