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Department of Information Technology

What's New in Microsoft 365 — September 2025 Latest Updates

New in Microsoft Teams

Malicious URL Protection in Teams Chat and Channels

Microsoft Teams can now detect and warn users about malicious URLs sent in chats and channels, improving protection against malware attacks. When a suspicious link is detected, Teams will automatically display a warning to both the sender and recipient. This feature helps users make safer decisions before clicking potentially harmful links. It applies to Teams for Windows desktop, Mac desktop, web, iOS and Android.

Screenshot of Teams chat blocking a message flagged as malicious link, warning shown in desktop view.

Weaponizable File Type Protection in Teams Chat and Channels

Teams now blocks messages containing unsafe file types, such as executables, in chats and channels to reduce the risk of file-based attacks. It applies to Teams for Windows desktop, Mac desktop, web, iOS and Android.

  • Recipients will see a notification that a message was blocked but cannot access the content.
  • Senders will receive a notification and can edit and resend the message without the unsafe file.

Screenshot of Teams chat blocking a message due to unpermitted file type, warning shown in desktop view.

Loop Pages in Teams Channels

Loop Pages are now available in Teams Channels, providing a dynamic canvas for real-time collaboration. Users can add Loop Pages as tabs within a channel, streamlining workflows across desktop and mobile platforms.

New Organizer Controls for Meetings

Microsoft Teams introduces Organizer Controls in the meeting toolbar to streamline access to key meeting management features. These controls consolidate existing capabilities into a single fly-out menu, improving usability and security for meeting organizers and co-organizers.

Full Meeting options panel accessed from the Organizer controls menu:

Screenshot of Teams meeting options for access, lobby bypass, sensitivity labels, and join/leave settings.

Quick Organizer controls menu in the meeting toolbar:

Screenshot of Teams meeting controls menu with options for lobby, chat, screen share, and protections.

Microsoft Teams Copilot Default Without Transcription

Copilot in Teams meetings will now default to running without transcription. Conversation history will persist during meetings, but transcription must be manually enabled to generate post-meeting insights. For example, Copilot can still recap what was said during the meeting in real time, but full transcripts will only be available if the organizer turns transcription on.

New in Microsoft Outlook

Copilot Chat Overlay in Outlook Mobile

Outlook has introduces a new Copilot Chat overlay for iOS and Android. Instead of accessing Copilot only from a tab, users can now chat with Copilot while continuing to interact with email, calendar and contacts. The overlay is context aware, meaning Copilot understands what you are viewing and can give tailored help. For example, if you are reading an email, Copilot can summarize or draft a reply, if you are in your calendar, Copilot can check your availability and if you are viewing contacts Copilot can surface recent interactions.

Copilot Chat overlay in iOS and Android:

Screenshot of Outlook for iOS inbox with Copilot overlay offering Work, Web, Prompt Gallery and Message Copilot.   Screenshot of Outlook for Android inbox showing Microsoft terms of use email, with Mail and Calendar icons.

Retirement of Web-Based "Share to Teams"

Between September 22 and October 3, 2025, the web-based Share to Teams feature in Outlook will retire. Users without the Teams desktop app will be prompted to install it. Those with the desktop app can continue sharing directly via Teams.

Relocated Send Button in Outlook Mobile

To reduce accidental sends, the Send button is moving from the bottom toolbar to the header area in Outlook Mobile. This update, rolling out to iOS and Android, places the button in a less crowded location, creating a more intentional and error-free messaging experience by minimizing the chances of unintentional taps.

New Send button placement in Outlook for iOS and Android:

Screenshot of Outlook for iOS new email with Copilot option and tooltip "Send has moved." Outlook for Android new email with Copilot draft option and tooltip "Send has moved."

New in SharePoint

Sections with AI

SharePoint introduces Sections with AI enabling authors to build page sections using natural language prompts. Copilot suggests content based on organizational knowledge documents and meeting transcripts reducing manual effort. Users can:

  • Add and refine sections using AI prompts
  • Ground prompts in relevant files for more accurate results
  • Choose from multiple generated layouts
  • Edit the final section like any other page content

Screenshot of SharePoint AI adds new section with suggestions like FAQs, resources and initiatives.

Coming Soon in Microsoft 365

End of Support for OneNote for Windows 10

Beginning October 14, 2025, OneNote for Windows 10 will become read only. Users will still be able to view notes but creating editing or syncing content will no longer be supported. Microsoft recommends transitioning to OneNote on Windows, which provides a modern, secure and feature rich experience that enhances collaboration and productivity.

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