M365 Message Center

Geändert

01.06.2026

Services

Microsoft Purview

Updated June 1, 2026: We have updated the timeline. Thank you for your patience.[Introduction] Microsoft Purview is introducing Classifier Simulation Mode, the first phase of the broader Classifier Health Monitoring Platform. This new capability allows admins to test and validate custom classifiers on production data before publishing. Simulation Mode enables admins to optimize classifier logic before deployment, helping in reducing false positives, scanning latency, and noisy matches. Admins will access simulation controls and classifier health insights directly in the Microsoft Purview compliance portal, making it easier to monitor and improve classifier performance in one centralized location.This message is associated with Roadmap ID 523201.[When this will happen:] Public Preview: Rollout begins late June 2026 (previously early March), completes by end of July 2026 (previously mid-Ap

Geändert

29.05.2026

Services

Microsoft Teams

Updated May 29, 2026: We have updated the timeline. Thank you for your patience. [Introduction] We’re introducing a private chat feature for organizers, co-organizers, and presenters in structured meetings and webinars in Microsoft Teams. This separate chat enhances collaboration by allowing key participants to communicate privately before, during, and after the event, without involving attendees. Additionally, we are unifying backroom chat behavior in town halls to ensure consistent functionality across all structured meetings. Currently, backroom chat behavior varies depending on whether streaming chat is enabled for town halls and whether the organizer has a Teams Premium license. This update removes that inconsistency.This message is associated with Roadmap ID 392328 and applies to Teams for Windows desktop, Teams for Mac desktop, Teams for the web, Teams for iOS/Android, MTR-W and M

Geändert

27.05.2026

Services

Microsoft Teams

Updated May 27, 2026: We have updated the timeline. This feature will now be included as part of another update referenced in MC796790. Administrators will gain the ability to manage Microsoft 365 certified SaaS applications through org-wide settings for third-party apps. No changes will be applied to tenant-wide settings unless initiated by an administrator. Thank you for your patience.This feature will empower administrators to manage the availability of trusted Microsoft Teams apps based on rules, for enhanced security. Admins will be able to manage Microsoft 365 certified apps in the Teams admin center through a new control in Org-wide settings. You can further customize the availability of these apps based on permissions accessed and publisher names. The system automatically checks the Microsoft 365 certified apps that meet all the conditions you specify and makes those apps availab

Geändert

22.05.2026

Services

Microsoft Copilot (Microsoft 365) · Microsoft 365 Copilot Chat

Updated May 22, 2026: We have updated the timeline. Thank you for your patience. [Introduction] We’re improving the reliability of Copilot chat by ensuring that conversations are preserved even when users navigate away from a chat. With this update, a session entry is created in the navigation pane as soon as a prompt is submitted. This allows users to return to the conversation later without losing context or progress.This capability will be available to Microsoft 365 Copilot Chat and Microsoft 365 Copilot users.This message is associated with Microsoft 365 Roadmap ID 500638. [When this will happen:] Worldwide (General Availability): Rolling out from December 12, 2025 (previously December 3), to end of June 2026 (previously end of April) GCC: Rolling out from January 19, 2026 (previously January 3), to end of June 2026 (previously end of April) GCC High: Rolling out from January 19, 202

Geändert

21.05.2026

Services

Microsoft Teams

Updated May 21, 2026: We have updated the timeline. Thank you for your patience. [Introduction]We’re introducing Multi-Select Forward in Microsoft Teams. This feature lets users select up to five messages from a chat or channel and forward them together in one message, preserving context and order. This update addresses customer feedback for easier message sharing and supports better collaboration. This message is associated with Microsoft 365 Roadmap ID 536997 and is applicable to Teams for Windows desktop, Teams for Mac desktop, and Teams for the web.[When this will happen:]Targeted Release: We will begin rolling out early January 2026 and expect to complete by mid-January 2026.General Availability (Worldwide, GCC): We will begin rolling out early February 2026 (previously mid-January) and expect to complete by mid-February 2026 (previously late January).General Availability (GCCH, DoD

Geändert

21.05.2026

Handlung bis

30.03.2026

Services

Microsoft 365 apps

Updated May 21, 2026: Phasing out to Legacy Auth Token (EAT) has been initiated and will complete by June 8th 2026. Thank you for your patience. [Introduction]We’re retiring the use of external access tokens for actionable messages and transitioning to Microsoft Entra-based authentication. This update enhances security and aligns with modern identity standards, providing a more robust and compliant experience for actionable messages. [When this will happen]This change takes effect on May 15, 2026. After this date, external access tokens will no longer be supported.[How this affects your organization]Who is affected:Organizations using actionable messages that currently rely on external access tokens.What will happen: Actionable messages that depend on external access tokens will fail after May 15, 2026. All integrations and workflows using actionable messages must adopt Microsoft Entra a