Microsoft Entra introduces cross-tenant security group synchronization, enabling centralized management and shared access across tenants. Public Preview starts late January 2026; general availability in late April 2026. Admins must opt in and configure attribute mappings and access policies. No compliance issues identified.
Site attestation policy is now generally available, enabling SharePoint admins to require site owners to periodically verify site ownership, membership, and sharing settings. This helps reduce compliance risks and prevent oversharing. The feature is off by default and requires admin setup with configurable enforcement actions.
We’ve released updates to the following update channel for Microsoft 365 Apps:
We are announcing the ability for admins to view security role information inside the Power Platform admin center. This feature will reach general availability on January 16, 2026.
Agent Mode lets you build and edit workbooks side by side with Copilot. When you’re updating budgets, creating financial models, or analyzing data, Agent Mode uses Excel’s most powerful tools like tables, charts, PivotTables, and formulas to help you get the job done.
Agent Mode is releasing to Copilot in Excel on Windows and Mac enabling users to build and edit workbooks with Copilot using multi-step workflows. Eligible licenses can now select which model to use, including both Open AI and Anthropic models.
The Data Security Posture Agent is designed to expand the capacity of data security admins as they proactively work to stay on top of a dynamic data and risk landscape within their organization. Its primary job is to help discover sensitive data across your data estate. This agent is designed to analyze and search documents, emails, and messages that match the natural-language discovery intent requested by the user and assess associated risks. By moving beyond traditional keyword and information-type analysis and harnessing the power of LLMs, this agent enables organizations to identify risks based on the actual purpose and context of the content and take appropriate action.
Use the new =COPILOT function directly in Excel formulas to generate, classify, and summarize text and data.
This update brings end user security reporting into Teams Admin Center. Admins can now view and download signals from messages users report as a security concern or not a security concern within TAC Protection reports, helping them identify trends and fine tune policies and responses.
Microsoft 365 Copilot app will show Chat in navigation for users blocked by admin policy but restrict access with a notice; ineligible users won’t see Chat and get a pop-up if accessing directly. Rollout starts late January 2026, no admin action required.
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