M365 Message Center

Geändert

29.01.2026

Services

SharePoint Online

Updated January 29, 2026: We are updating this post as a reminder. Upcoming SharePoint Online changes may impact your organization. Please review the below.We are implementing the following changes to custom scripting and classic publishing in SharePoint Online.1. Disablement of custom scriptingCustom scripting will be disabled by default (setting DenyAddAndCustomizePages to 1 or $true) for sites created with the following templates:BLANKINTERNETCONTAINER#0 = Classic Publishing Portal Site CMSPUBLISHING#0 = Classic Publishing Site BLANKINTERNET#0 = Classic Publishing Site BlankCSPCONTAINER#0 = SharePoint Embedded SiteNOTE: Existing classic publishing sites created with the templates listed above will have custom scripting disabled by default. Disabling custom scripting does not affect the execution of scripts that have already been added to a site or page.Refer to this documentation to l

Geändert

28.01.2026

Handlung bis

31.01.2027

Services

Microsoft Defender XDR

Updated January 26, 2026: We have updated the content. Thank you for your patience. [Introduction] We’re retiring the Microsoft Defender for Endpoint (MDE) Advanced Hunting API and Microsoft Defender XDR Advanced Hunting API and transitioning customers to the Microsoft Graph Security API. This update aligns our security integrations with a unified interface and schema across Microsoft Defender products. The Microsoft Graph Security API provides broader data coverage, improved consistency, and better scalability for automation and security workflows. [When this will happen] Retirement start: February 6, 2026 Full retirement: February 1, 2027 After February 1, 2027, the MDE and XDR APIs will no longer function. [How this affects your organization] Who is affected: Organizations using the MDE or XDR Advanced Hunting API for automation, integration, or custom workflows.You are receiving this

Geändert

28.01.2026

Services

Windows

IMPORTANT: This notice is only relevant for environments where:Microsoft Office is usedScan Cab is used to check for update complianceThe January 2026 Scan Cab was deployed before 2:30 PM PT on January 27, 2026.An updated version of the January 2026 Scan Cab was made available at 2:30 PM PT on January 27, 2026. This Scan Cab includes new metadata corresponding to new updates for Microsoft Office 2016.The new security updates for Microsoft Office released January 26, 2026, included additional protections to address CVE-2026-21509. Reliance on untrusted inputs in a security decision in Microsoft Office allows an unauthorized attacker to bypass a security feature locally. See the additional information section of this message for details.How this affects your organization:IT administrators who downloaded the Scan Cab before 2:30 PM PT on January 27, 2026, should re-acquire and re-deploy it

Geändert

26.01.2026

Services

Windows

(Updated 1/26 to adjust Windows Server entries and links)Microsoft released today a resolution for an issue observed after installing the January 2026 Windows security update. This issue may cause applications that open or save files stored in cloud‑backed locations to become unresponsive or display errors. Some installations of Outlook may also become unresponsive and fail to open when PST files are stored in cloud‑backed storage such as OneDrive. An out-of-band (OOB) update was released today, January 24, 2026, to address this issue. This cumulative update includes all protections and improvements from the January 2026 Windows security update released January 13, 2026, as well as from the OOB update released on January 17, 2026 (which introduced fixes for two known issues: remote desktop connections and hibernation failures). This OOB update is available through Windows Update for Wind

Geändert

22.01.2026

Services

Microsoft Intune

As mentioned in MC540749 and MC1029989, Microsoft Entra ID (formerly known as Azure Active Directory) and Microsoft Intune will retire the Conditional Access “Require approved client app” grant control in June 2026 (previously March 2026). We recommend utilizing the "Require application protection policy" grant control, which provides the same data loss and protection with additional benefits.[How this will affect your organization:]If you have a Conditional Access policy with "Require approved client app" grant control configured, after this change, you will no longer be able to enforce this control, it will be as if this grant is not selected.[What you need to do to prepare:]We recommend updating your Conditional Access policy to using the "Require application protection policy" grant control. For more information, see Migrate approved client app to application protection policy in Con

Geändert

21.01.2026

Services

Windows

Mark your calendars for February 5, 2026. Windows engineering teams will be hosting a second Ask Microsoft Anything (AMA) on the Microsoft Tech Community to help you get the information you need about updating Secure Boot certificates on your Windows devices before they start expiring in June 2026. Experts will be on camera and in the chat to help you with update scenarios, inventorying your estate, formulating the right deployment plan for your organization, and more. When will this happen:This one-hour AMA event will start at 8:00 AM PST (3:00 PM UTC) on February 5, 2026. What you need to do to prepare:Visit the event page, then select Add to Calendar. Want an event reminder? Log in to the Tech Community and select Attend. Can’t attend at that time? Scroll to the bottom of the event page, then post your questions early where it says “Comment.” The event will be recorded so you can catc