MC1193628: The December 2025 Windows security update is now available
🚨Major Update: This post contains a significant change that may impact your
Microsoft 365 Message Center
An archive of Message Center updates - curated and preserved for when Microsoft changes things faster than you can say "rolling out." Find the latest and past Message Center posts right here. Updated daily at 1am (UK time).
MC1193604: Dynamics 365 Customer Insights – Journeys – Wait on segment membership to trigger next step in a journey
We are announcing the ability to have a journey wait for a
MC1193465: Power Platform - New data request metrics for Power Platform Monitor and Power Apps Monitor for canvas apps
We are announcing two new operational-health metrics for Power Platform Monitor and
MC1193456: Power Platform – Power Platform Monitor Overview page and predefined alerts
We are announcing the ability for admins to access the new Power
MC1193421: Retirement of several Microsoft Planner features in early 2026 as part of a Planner update
In early 2026, Microsoft Planner will roll out a major update with new features like task chats and custom templates, while retiring features including the old task comments, whiteboard tab for premium plans, iCalendar feed, Planner integration in Viva Goals, and Planner components in Loop pages....
MC1193419: Content Security Policies (CSP) are coming to SharePoint Online and might impact your custom SPFx solutions
Starting March 1, 2026, SharePoint Online will enforce Content Security Policy (CSP), blocking scripts from non-trusted sources in custom SPFx solutions. To avoid disruption, ensure all scripts come from trusted sources and move inline scripts to files. CSP enforcement can be postponed 90 days vi...
MC1193415: Microsoft Teams: Find SharePoint agents in Teams chats and Teams Store
Users can discover and add SharePoint agents directly in Microsoft Teams chats on Desktop and Mac via the Add Agents and Bots option or the Teams Store under Agents. The feature rolls out in January 2026, requires no admin action, and supports users with appropriate licensing.
MC1193414: Microsoft 365 Copilot: Add web links as references in Copilot Notebooks
Microsoft 365 Copilot Notebooks will allow users with a Copilot license to add public web links as references, expanding beyond file types like Word and Excel. This feature, enabled by default, will roll out worldwide from mid-November 2025 to mid-January 2026. No special preparation is needed.
MC1193413: Microsoft 365 Copilot: Data source-specific filters in search
Microsoft 365 Copilot search will introduce dynamic, data source-specific filters for Outlook, SharePoint, Teams, and others, enabling precise result refinement. This feature, requiring a Copilot license, will roll out from mid-November 2025 to early January 2026, enabled by default with no admin...
MC1193412: Microsoft 365 Admin Center: Retirement of Technology Experiences score from Adoption Score
The Technology Experience score and its sub-scores will be retired from the Microsoft 365 Adoption Score between Jan 15-30, 2026. The Adoption Score will then reflect only the People Experiences sub-score, reducing the maximum score from 900 to 600. This change is automatic and affects admins, no...
MC1193410: Automatic Windows event auditing configuration availability for unified sensors (V3.x)
Starting January 2026, Microsoft Defender for Identity unified sensors (v3.x) will offer an opt-in feature for automatic Windows event-auditing configuration, simplifying deployment by auto-applying required settings on new and misconfigured existing sensors. Admins must enable this feature via U...
MC1193408: (Update)Action Required: Trust DigiCert Global Root G2 Certificate Authority for using Entra services by January 7, 2026
By January 7, 2026, Microsoft Entra will switch from DigiCert Global Root G1 to G2 certificates. Organizations must trust the DigiCert G2 root CA and remove pinning to G1 to avoid authentication failures with Entra services like login.microsoftonline.com. Update settings promptly to prevent disru...