M365 Message Center

Geändert

22.10.2025

Services

SharePoint Online · Microsoft Copilot (Microsoft 365)

Updated October 22, 2025: We have updated the content below. Thank you for your patience. [Introduction] We’re introducing Knowledge Agent, a built-in SharePoint capability that helps organizations prepare content for AI at scale. It unifies fragmented AI features into a single, context-aware interface that adapts to user roles and surfaces intelligent actions directly in the flow of work. This enhancement supports high-quality, trustworthy responses from Microsoft 365 Copilot and custom agents. [When this will happen:] Public Preview (Worldwide): Begins mid-September 2025; completes by late February 2026. [How this affects your organization:]Who is affected: Users with a Microsoft 365 Copilot license on tenants opted into Knowledge Agent preview. Admins managing SharePoint content and agents. What will happen: A floating button will appear in the lower-right corner of SharePoint surface

Geändert

22.10.2025

Services

SharePoint Online

Updated October 22, 2025: We have updated the content below with Power Automate templates to assist in this transition.Microsoft is retiring the SharePoint Alerts feature to streamline and modernize user notifications. With Power Automate, organizations can benefit from an enhanced, versatile solution that goes beyond traditional alerts, offering seamless integration across Microsoft 365 services and more.Key Points Major: Retirement Timeline: Starting from July 2025, the creation of new SharePoint Alerts will be gradually turned off for newly onboarding tenants.Starting from October 2025, the SharePoint Alert expiration feature will be gradually activated. Once activated, any SharePoint Alert will have a validity of 30 days starting from its first run, then it will expire. Users can self-service re-enable expired SharePoint Alerts and extend their expiration for another 30 days. Re-enab

Geändert

20.10.2025

Services

Exchange Online

In 2018, we announced that we were no longer making feature updates to Exchange Web Services (EWS) in Exchange Online, and we advised developers to move to Microsoft Graph. In September 2023, we announced that on October 1, 2026, we will start blocking EWS requests to Exchange Online. We are now less than 12 months from October 1, 2026. We have made progress on closing several parity gaps with more changes in development to be released in the coming quarters. Please refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. You are receiving this notification because there are EWS applications in your tenant. If you haven't already, start the process of working with your application development organization and your application vendors to either sunset or migrate active EWS applications on your tenant to the Graph API or Power Platfo

Geändert

16.10.2025

Services

SharePoint Online · Microsoft OneDrive

Organizations undergoing rebranding, mergers, acquisitions, divestitures, or tenant consolidations often need their SharePoint domain name in URLs to reflect their new identity. The SharePoint Online Tenant Rename feature enables this change. We are announcing general availability of advanced tenant rename with no site count limitation. With this update, the feature is now accessible to all customers, regardless of the total number of sites in the tenant. When this will happen: General availability begins worldwide on October 16, 2025. Rollout started in early October and is expected to complete by mid-October 2025. How this affects your organization: Who is affected: Admins managing SharePoint Online and OneDrive for Business tenants globally. What will happen: Rename support is now available for all Microsoft 365 tenants, regardless of site count. High reliability is maintained across

Geändert

15.10.2025

Handlung bis

30.09.2026

Services

Exchange Online

Updated October 15, 2025: We have updated the message to show as intended. Thank you for your feedback.In 2018, we announced that we were no longer making feature updates to Exchange Web Services (EWS) in Exchange Online, and we advised developers to move to Microsoft Graph. In September 2023, we announced that on October 1, 2026, we will start blocking EWS requests to Exchange Online. We are now less than 12 months from October 1, 2026. We have made progress on closing several parity gaps with more changes in development to be released in the coming quarters. Please refer to Deprecation of Exchange Web Services in Exchange Online for up-to-date guidance and roadmap information. You are receiving this notification because there are EWS applications in your tenant. If you haven't already, start the process of working with your application development organization and your application vend

Geändert

15.10.2025

Services

Windows

Use the newly published guide and tools to start updating your organization’s expiring Secure Boot certificates. As the 2011 certificate authorities (CAs) start expiring in June 2026, 2023 CAs are required. Updated CAs allow Secure Boot to continue preventing malware early in the startup sequence. New resources are available for you to start monitoring, deploying, and troubleshooting Secure Boot CAs. These include the deployment playbook, new registry keys, Windows Event Log, and Windows Configuration System (WinCS) APIs. When will this happen: The deployment guide, new registry keys, and WinCS are available today. The 2023 Secure Boot CAs are rolling out gradually as part of Windows monthly updates starting with the October 2025 security update. Additional tools will be available soon. The 2011 CAs start expiring beginning in June 2026. How this will affect your organization: Devices ma