As part of our Secure Future Initiative (SFI), the tenant isolation feature will be enabled by default for all Power Platform tenants as the new default behavior. The enforcement is scheduled to begin in February 2026.
Microsoft Teams’ Channel Agent, a Copilot-powered assistant, is updated to support file-based grounding from Channel SharePoint, enhanced task and report management, GitHub MCP integration, and multilingual support. Rollout starts mid-November 2025, requiring no admin action but allowing admin control over agent auto-creation.
Microsoft 365 Copilot for Android preview lets users open Word, Excel, and PowerPoint files with Copilot Chat for summaries. Editing requires switching to standalone apps. Offline access and advanced file management move to standalone apps. Rollout starts mid-November 2025, completing by mid-January 2026. Admins should plan app deployment accordingly.
Microsoft Teams on the web will introduce a new user-enabled setting to detect device activity beyond the Teams tab, improving presence accuracy. Rolling out December 2025 for Chrome v94+ and Edge v114+. No admin action needed; users must grant browser permission to enable it.
Outlook for iOS and Android will automatically collapse automatic replies in email threads by default starting December 2025. Users can expand these replies if needed. This change applies to all users, requires no configuration, and does not affect message delivery or reply behavior.
Microsoft 365 Copilot’s People agent, launching in Frontier with public preview in November 2025 and general availability in Q1 2026, helps users discover organizational insights from emails, chats, meetings, and documents. Admins control deployment and access via Microsoft Entra ID groups; users need a Copilot license and enabled People Skills service.
Agent mode in Excel, formerly part of the Frontier program, will be generally available worldwide from early December 2025 to late February 2026. It allows Microsoft 365 Copilot-licensed users to build and edit workbooks alongside AI, supporting tables, charts, PivotTables, and formulas without admin changes.
App Skills in Excel will be retired starting December 2025, replaced by Agent Mode in Excel for a streamlined experience. All Microsoft 365 Copilot Excel users will lose App Skills access. No admin action is needed; users should explore Agent Mode and update documentation accordingly.
Identify if an external user comes from a domain that is impersonating the recipient tenant’s own domains, during their initial contact with an enterprise user via Teams messages.
With the lite version of Copilot Studio in M365, users can now use Office skills like generating PowerPoint decks, Excel spreadsheets, and Word documents by chatting with the agent. This helps users save time by completing commonly used tasks. These Office skills will come as a part of the “Generate documents, charts, and code” capability in Copilot Studio lite (formerly known as Code Interpreter).
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