M365 Message Center

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

Geändert

14.10.2025

Services

Windows

Today, October 14, 2025, Windows 10 has reached end of support*. The October 2025 monthly security update is the final update available for the last supported versions: Windows 10, version 22H2 (Home, Pro, Enterprise, Education, and IoT Enterprise editions), Windows 10 2015 LTSB, and Windows 10 IoT Enterprise LTSB 2015. Devices running these versions will no longer receive monthly security and preview updates containing protections from the latest security threats.*Note: Long-Term Servicing Branch (LTSB) and Long-Term Servicing Channel (LTSC) releases are subject to different lifecycle support policies. Check out the Microsoft lifecycle website for more information. When this will happenToday, October 14, 2025, Windows 10 has reached end of support.How this will affect your organizationThe October 2025 monthly security update is the final update available for these versions. After today,

Geändert

14.10.2025

Services

Windows

Today, October 14, 2025, Windows 11, version 22H2 (Enterprise, Education, and IoT Enterprise editions) has reached end of servicing. The October 2025 monthly security update is the final update available for this version. Devices running this version will no longer receive monthly security and preview updates containing protections from the latest security threats.As always, we recommend that you update your devices to the latest version of Windows 11. For detailed information, see the Windows 11, version 22H2 reaching end of updates (Enterprise, Education, IoT Enterprise) lifecycle page. For information about servicing timelines and lifecycle, see Windows 11 release information, Lifecycle FAQ - Windows, and Microsoft Lifecycle Policy search tool.

Geändert

14.10.2025

Services

Windows

The October 2025 security update is now available for all supported versions of Windows. We recommend that you install these updates promptly. For more information about the contents of this update, see the release notes, which are easily accessible from the Windows 11 and Windows 10 update history pages. To learn more about the different types of monthly quality updates, see Windows monthly updates explained. Highlights for the Windows 11, version 25H2 update: This security update includes improvements that were a part of update KB5065789 (released September 29, 2025).This update addresses security issues for your Windows operating system. This update addresses an issue that caused the print preview screen to stop responding in Chromium-based browsers.This update addresses an issue that occurred when users signed in to a Windows device using only a Gamepad at the lock screen. If no othe