M365 Message Center

Geändert

10.02.2026

Services

Windows

The February 2026 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 update history page. 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 KB5074109 (released January 13, 2026), KB5077744 (released January 17, 2026), and KB5078127 (released January 24, 2026).This update makes quality improvements to the servicing stack, which is the component that installs Windows updates.This update addresses an issue that determines device eligibility for the full-screen gaming experience.This update addresses an issue that pre

Geändert

08.02.2026

Services

Windows

11:30 am PT update: Microsoft Store and Windows Update services have been restored. Some IT administrators may continue to experience residual latency affecting Windows Server update operations, including the Windows Server sync API. This Server‑specific issue is being addressed separately. If you experience this latency, please contact Microsoft Support for business.8:34 am PT post: A power outage at a datacenter is impacting customers’ ability to complete operations in the Microsoft Store and Windows Update. As a result, some users may experience failures or timeouts when installing or updating Microsoft Store apps, or when downloading Windows updates.Although power has been restored, service recovery is still in progress. Storage services are gradually returning online, and some customer impact may continue while recovery completes.Microsoft is actively working to restore full-service

Geändert

05.02.2026

Services

Windows

Windows is moving toward a more secure authentication model by phasing out New Technology LAN Manager (NTLM) in favor of stronger, Kerberos‑based alternatives. This transition is taking a three-phased approach, leading toward disabling NTLM by default in upcoming Windows releases. With each phase come new capabilities so that your organization has the tools, visibility, and compatibility support needed. When will this happen: NTLM has been deprecated since June 2024. Today, enhanced auditing is available as part of Phase 1 toward NTLM disablement. In the second half of 2026, new tools will be available to Windows Server 2025 and Windows 11, version 24H2 and later: IAKerb, Local KDC, upgrade to negotiate Kerberos. With the next version of Windows Server and its corresponding client version, NTLM will be disabled by default. Additional support for handling NTLM-only cases will be built in.

Geändert

05.02.2026

Services

Exchange Online

[Introduction] We're updating the timeline and process for the retirement of Exchange Web Services (EWS) in Exchange Online. As previously announced, EWS will be retired in favor of Microsoft Graph, which offers improved security, modern authentication, and broader capability support. A phased disablement begins October 1, 2026, with permanent shutdown starting April 1, 2027. [When this will happen:] Phased EWS disablement begins: October 1, 2026 Full and permanent EWS retirement: April 1, 2027 EWS App AllowList feature availability: Coming soon (before retirement milestones) [How this affects your organization:] Who is affected: Organizations using custom or vendor applications that rely on EWS Workflows involving mail, calendar, or integrations that use EWS This change only impacts Exchange Online; Exchange Server (on-premises) is not affectedWhat will happen: Beginning October 1, 2026

Geändert

04.02.2026

Services

Windows

Catch up on important changes and evolving standards that will help strengthen the security of the Windows ecosystem across client, cloud, and server with Windows news you can use for January 2026. Learn about new tools to help with Secure Boot certificate updates and a new command-line tool for Windows app developers. Explore features and enhancements that will start gradually rolling out in February, which include improvements to Cross-Device Resume, Narrator, Voice Access, MIDI support, and the Settings home page. When will this happen:Some improvements summarized in this monthly recap are already available, while others are rolling out gradually. What you need to do to prepare:Read January’s recap, which includes links to resources to help you start benefiting from the latest improvements. Additional information:To keep up with new capabilities and features as they are announced, fol

Geändert

04.02.2026

Services

Exchange Online · Microsoft 365 for the web

[Introduction] We’re retiring the OneView and TrueTime features from Outlook Web App (OWA). OneView allows users to connect personal email accounts—such as Outlook.com, Gmail, or other IMAP accounts—to their work mailbox in OWA, providing a unified view of multiple inboxes. TrueTime allows users to view personal and work calendars together in OWA for consolidated scheduling. Once these features are retired, users will no longer be able to connect personal accounts or view personal calendar information inside OWA. [When this will happen:] This retirement will begin in early March 2026 and complete by late June 2026. [How this affects your organization:] Who is affected: Users who currently use OneView or TrueTime in OWA. Users who have connected work and personal accounts within OWA. What will happen: OneView and TrueTime features will be removed from OWA. Users will no longer be able to