M365 Message Center

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05.06.2026

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Exchange Online · Microsoft 365 apps

Updated June 5, 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): This is now currently available.General Availability (GCC): Rollout begins in early June 2026 (previously early May) and is expected to complete by end of June 2026 (previously late May).How this affects your organization Users with offline mode enabled in the new Outlook for Windows will be able to attach files to draft emails while

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04.06.2026

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Microsoft 365 apps · Microsoft Copilot (Microsoft 365) · Microsoft 365 Copilot Chat

Updated June 4, 2026: We have updated the content and timeline. Thank you for your patience. Starting June 2026, we will resume the automatic installation of the Microsoft 365 Copilot app to eligible devices with the Microsoft 365 desktop apps. This change simplifies access to Copilot and ensures users can easily discover and engage with productivity-enhancing featuresWhen this will happenFeature Flag1: started Jun 4 expected to finish June 10 Feature Flag2: expected to start on June 11, expected to finish on June 17 MSGraph schema rollout: expected to start on June 18, expected to finish on June 24 Feature Flag3: expected to start on June 25, expected to complete by July 1stHow this affects your organizationThe Microsoft 365 Copilot app will be automatically installed on Windows devices that have Microsoft 365 desktop apps, unless administrators opt out.On devices where the app is alrea

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04.06.2026

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Microsoft Copilot (Microsoft 365)

Updated June 4, 2026: We have updated the timeline. Thank you for your patience. [Introduction] We’re introducing a new capability in Microsoft 365 Copilot chat that allows users to RSVP to meetings directly within the chat experience. This enhancement simplifies meeting management by enabling quick responses such as Accept, Decline, Tentative, Follow, or Remove canceled meetings—all without leaving Copilot chat. [When this will happen] General Availability (Worldwide): Rollout will begin by mid-January 2026 (previously early January) and is expected to complete by end of April 2026 (previously mid-February).General Availability (GCC and DoD): Rollout will begin by early September 2026 and is expected to complete by mid-September 2026. [How this affects your organization] Who is affected: Users with a Microsoft 365 Copilot license. What will happen: Users can RSVP to meetings directly fr

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03.06.2026

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Microsoft Copilot (Microsoft 365)

Updated June 3, 2026: We have updated the timeline. Thank you for your patience. What and WhyWe’re introducing a new capability that allows users with a Microsoft 365 Copilot license to scope and control Copilot Chat responses by selecting specific content sources. This enhancement is designed to improve the relevance and accuracy of Copilot responses by limiting them to user-selected sources, aligning with customer feedback for more transparent and customizable AI interactions.This message is associated with Microsoft 365 Roadmap ID 496596Rollout ScheduleGeneral Availability (Worldwide): Rollout will begin mid-June 2026 (previously early June) and is expected to complete by end of June 2026 (previously mid-June).Impact on Your Organization Who is affected: Users with a Microsoft 365 Copilot license. What will happen: Users will see a new option to select content sources when using Copil

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03.06.2026

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Microsoft Teams

Updated June 3, 2026: We have updated the content. Thank you for your patience.Coming soon to Microsoft Teams: When users connect to their organization's Wi-Fi, Teams can automatically check them in to a building or a reserved desk. This makes it easier for users to coordinate work with their coworkers and connect in person.This feature is off by default in every tenant and requires tenant admins you to take action to turn it on and configure it. After you turn it on, end-users remain in control and can choose whether to share their work location with their coworkers.This message applies to Teams for Windows and Teams for macOS.This message is associated with Microsoft 365 Roadmap ID 488800. [When this will happen:] General Availability (Worldwide): We will begin rolling out early June 2026 (previously early May) and expect to complete by late June 2026 (previously late May).[How this wi

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03.06.2026

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Microsoft Teams

Update as of June 2, 2026 – We have updated the timeline. Thank you for your patience. Migration of channels is complete with a few pending channels for which we have shared more information here for admin remediation. Admins must take action within 30 days, by end of July, 2026, to remediate specific private channel configurations that are currently not eligible for migration. There are two impacted scenarios.The first includes private channels with no users, where the roster is empty and the channel is inaccessible to any tenant user. The second includes private channels that contain only guest users and no in-tenant owners. In both cases, these channels cannot be migrated in their current state. To complete migration of these channels, admins are required to add at least one in-tenant user as an owner to each affected private channel by end of July, 2026. This ensures the channels hav