Microsoft Release Notes

• Interpreter in Microsoft Teams calls: Interpreter, now available in Teams meetings, is expanding to Teams calls. Interpreter enables real-time speech-to-speech interpretation in nine languages, allowing participants to speak and listen in their preferred language. Interpreter helps eliminate language barriers and fosters seamless collaboration across global teams. For a more inclusive experience, users can also opt to have the Interpreter simulate their personal voice.
• Autocorrect in Teams compose: Users will now have commonly misspelled words automatically corrected in compose.
• Teams admin center - VDI optimization monitoring in Best practice configurations dashboard: Administrators can monitor which locations and users across their organization are facing meeting-related quality issues due to unoptimized Virtual Desktop Infrastructure (VDI).

Version 2601 (Build 19628.20150)

Feature updates

OneNote

• Improved proofing language control: OneNote now applies your chosen proofing language more consistently, so you don’t have to reset it for every paragraph when writing in multiple languages.

Resolved issues

Excel

• We fixed an issue that caused Office applications to become unresponsive when profile card-related activities are performed.
• Local file support for Copilot Chat: Added support for Copilot Chat in modern Excel workbooks stored on your device, giving you the flexibility to query Copilot Chat no matter where your files are located.

PowerPoint

• We fixed an issue that caused Office applications to become unresponsive when profile card-related activities are performed.
• Fixed an issue where opening a PowerPoint document from OneDrive sometimes opened a new presentation with a prompt to add a first slide, even if the presentation already contained slides.

Word

• We fixed an issue that caused Office applications to become unresponsive when profile card-related activities are performed.

Microsoft 365 Copilot extensibility

• Admins can set up connector authentication faster with a simplified experience [Web]

  Admins can now set up connector authentication faster through a simplified and guided OAuth experience.

  Details:

  What changed: Previously, connector authentication required manual steps and extensive documentation. The new experience introduces a streamlined, guided OAuth flow that significantly reduces setup time.

  Why: This change modernizes the authentication framework and reduces friction for admins configuring connectors.

  Try this:

  • Open connector setup and follow the guided OAuth flow.
  • Complete authentication for supported connectors such as Gong, GitHub, or Monday.

  Why this matters:

  Business impact: Reduces configuration time and operational overhead for IT teams.

  Personal impact: Makes connector setup faster and easier for admins.

  Additional resources:

  Learn:

  Set up Microsoft 365 Copilot connectors in the Microsoft 365 admin center

• Users can refresh Adaptive Cards in agents to view the latest information [Web]

  Users can refresh Adaptive Cards in agents to ensure they always see the most current information in their workflows.

  Details: …

Updates released between January 13, 2025, and January 27, 2026.

Microsoft 365 Copilot Chat

• Copilot Chat model selector now offers GPT-5.2 [Android, Windows, iOS, Mac, Web]

  Choose GPT-5.2 in Copilot Chat for faster responses or deeper reasoning, improving accuracy and clarity.

  Details:

  What changed: The model selector in Copilot Chat now includes GPT-5.2. Users can pick Quick Response for immediate answers or Think Deeper for more thorough reasoning. GPT-5.2 delivers better instruction following, improved math and coding performance, and clearer explanations compared to previous models.

  Why: This update provides more flexibility and precision, helping users handle both simple and complex tasks with adaptive reasoning.

  Try this:

  • Select More in the model selector and choose Quick Response for quick answers.
  • Choose Think Deeper when you need detailed reasoning for complex queries.

  Why this matters:

  Business impact: Enhances productivity by offering tailored response modes for different workflows.

  Personal impact: Gives individuals control over response depth, improving efficiency and clarity.

  Additional resources:

  Blogs:Available today: GPT-5.2 in Microsoft 365 Copilot

• Copilot icon visibility in Microsoft Edge [Web]…

Version 2512 (Build 19530.20144)

Security updates listed here.

Resolved issues

Excel

• We fixed an issue that caused Office applications to become unresponsive when profile card-related activities are performed.

PowerPoint

• We fixed an issue that caused Office applications to become unresponsive when profile card-related activities are performed.

Word

• We fixed an issue that caused Office applications to become unresponsive when profile card-related activities are performed.

Office Suite

• Added the Office.context.mailbox.ews.diagnostics.getTokenStatusAsync API for Outlook Event-Based Add-ins.
• Fixed a rare condition (during collaboration sessions only) in which the most recent changes to a document were overwritten by changes from another user/device that did not correctly save the most recent changes.

Updates released between December 23, 2025, and January 13, 2026.

Microsoft 365 admin center

• Admin control to customize AI disclaimers in Copilot Chat [Windows, Web]

  We updated the AI Disclaimer experience in Microsoft Copilot Chat based on customer feedback. To address this, we introduced an admin control that allows organizations to customize how the disclaimer appears, improving user awareness and flexibility.

  Details:

  What changed: The AI disclaimer will remain visible in the user experience. Admins will gain the ability to heighten this message and to provide a link to their own documentation. The disclaimer will display bolded text for increased visibility. Admins can configure a custom URL pointing to their AI policy documentation.

  Why: Organizations asked for more control over how the disclaimer appears to improve user awareness and flexibility.

  Try this:

  • Review the new AI Disclaimer setting in the Admin Portal.
  • Decide whether you want to configure this setting for your organization.
  • If desired, prepare a custom URL to include in the UX.
  • Communicate this change to your helpdesk staff and Copilot users.
  • Update internal documentation if you reference the disclaimer experience.

  Why this matters:

  Business impact: Allows organizations to customize how the disclaimer appears.

  Personal impact: Improves user awareness of the disclaimer. …

Microsoft 365 admin center

• Admin control to customize AI disclaimers in Copilot Chat [Windows, Web]

  We updated the AI Disclaimer experience in Microsoft Copilot Chat based on customer feedback. To address this, we introduced an admin control that allows organizations to customize how the disclaimer appears, improving user awareness and flexibility.

  Details:

  What changed: The AI disclaimer will remain visible in the user experience. Admins will gain the ability to heighten this message and to provide a link to their own documentation. The disclaimer will display bolded text for increased visibility. Admins can configure a custom URL pointing to their AI policy documentation.

  Why: Organizations asked for more control over how the disclaimer appears to improve user awareness and flexibility.

  Try this:

  • Review the new AI Disclaimer setting in the Admin Portal.
  • Decide whether you want to configure this setting for your organization.
  • If desired, prepare a custom URL to include in the UX.
  • Communicate this change to your helpdesk staff and Copilot users.
  • Update internal documentation if you reference the disclaimer experience.

  Why this matters:

  Business impact: Allows organizations to customize how the disclaimer appears.

  Personal impact: Improves user awareness of the disclaimer.

Microsoft 365 Copilot app …

Updates released between December 10, 2025, and December 23, 2025.

Microsoft 365 Copilot app

• GPT-5 powers Copilot Chat by default [Android, Windows, iOS, Mac, Web]

  Copilot Chat delivers faster, smarter results using GPT-5 as the default model.

  Details:

  What Changed: All Copilot Chat experiences run on GPT-5 by default. Copilot automatically routes prompts to the best-performing models for each task, using fast models for basic tasks and specialized reasoning models for multi-step requests.

  Why: Users want speed, accuracy, and minimal friction. This update helps to ensure consistent, high-quality AI interactions in Copilot Chat.

  Try This:

  • "Get me up to speed on the latest plans related to [project/initiative]. Help me think through what to do next."
  • "Use the attached spreadsheet with customer feedback to create a polished executive report that helps upper management decide where to prioritize resources in our next cycle."

  Why this matters:

  Business Impact: Increases accuracy and productivity, helping teams make strong decisions and complete complex work faster.

  Personal Impact: Removes friction by letting Copilot choose the best model--fast or reasoning--for the prompt.

  Additional resources:

  Blogs: …

Version number: 18.6.1.1 Released: December 17, 2025

Download x64 installerDownload x86 installerDownload ARM64 installer

If you need to download the installer in a language other than the one detected for you, you can use these direct links. For the x64 driver: Chinese (Simplified) | Chinese (Traditional) | Czech | English (United States) | French | German | Italian | Japanese | Korean | Polish | Portuguese (Brazil) | [Russian](https://go.microsoft.com/fwlink/?linkid=…

• Pop out your core apps into a new window: Users can now open their core applications, such as Chat, Teams, and more, in separate windows by selecting "Open in new window" from the app's context menu.
• Interpreter agent improvements: We're enhancing the Interpreter experience to deliver more accurate and consistent multilingual meeting experiences across interpretation, captions, and transcripts.
• Auto-detect & auto-update spoken language: Previously, Interpreter automatically detected and updated spoken language for Interpreter agent, but Live Captions and Live Transcripts required users to manually configure their spoken language, even in the same meeting. With this improvement, spoken language is now autodetected and autoupdated consistently across Interpreter, Live Captions, and Live Transcripts. This ensures all speech features stay aligned with the actual language being spoken without manual setup.
• Preparing status indicator: A new preparing status gives users clearer visual feedback when Interpreter is initializing, helping them understand when the system is ready. This is critical for those who rely on visual cues in multilingual meetings.
• Interpreter settings optimization: Concise explanations are added in Interpreter settings to clarify how each configuration and field works, reducing setup friction and user confusion. …

Microsoft 365 Copilot app

• GPT-5 powers Copilot Chat by default [Android, Windows, iOS, Mac, Web]

  Copilot Chat delivers faster, smarter results using GPT-5 as the default model.

  Details:

  What Changed: All Copilot Chat experiences run on GPT-5 by default. Copilot automatically routes prompts to the best-performing models for each task, using fast models for basic tasks and specialized reasoning models for multi-step requests.

  Why: Users want speed, accuracy, and minimal friction. This update helps to ensure consistent, high-quality AI interactions in Copilot Chat.

  Try This:

  • "Get me up to speed on the latest plans related to [project/initiative]. Help me think through what to do next."
  • "Use the attached spreadsheet with customer feedback to create a polished executive report that helps upper management decide where to prioritize resources in our next cycle."

  Why this matters:

  Business Impact: Increases accuracy and productivity, helping teams make strong decisions and complete complex work faster.

  Personal Impact: Removes friction by letting Copilot choose the best model--fast or reasoning--for the prompt.

  Additional resources:

  Blogs:

  Available today: GPT-5 in Microsoft 365 Copilot …