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Microsoft 365 Release Notes

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Last updated: Feb 4, 2026

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  • Feb 3, 2026
    • Date parsed from source:
      Feb 3, 2026
    • First seen by Releasebot:
      Feb 4, 2026

    Microsoft 365 by Microsoft

    Version 2601: February 03

    Version 2601 (Build 19628.20166)

    • Various fixes to functionality and performance.
    Original source Report a problem
  • Jan 27, 2026
    • Date parsed from source:
      Jan 27, 2026
    • First seen by Releasebot:
      Jan 28, 2026
    • Modified by Releasebot:
      Feb 4, 2026

    Microsoft 365 by Microsoft

    Version 2601: January 27

    Version 2601 introduces stability fixes across Word, Excel and PowerPoint plus Copilot Chat in modern Excel workbooks. OneNote gains improved proofing language control for multi language writing. Fixes address unresponsiveness and PowerPoint prompts from OneDrive.

    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.
    Original source Report a problem

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  • Jan 21, 2026
    • Date parsed from source:
      Jan 21, 2026
    • First seen by Releasebot:
      Jan 9, 2026
    • Modified by Releasebot:
      Feb 4, 2026

    Microsoft 365 by Microsoft

    Version 2512: January 21

    Version 2512 (Build 19530.20184)

    • Various fixes to functionality and performance.
    Original source Report a problem
  • Nov 20, 2025
    • Date parsed from source:
      Nov 20, 2025
    • First seen by Releasebot:
      Dec 12, 2025

    Microsoft 365 by Microsoft

    Version 2510: November 20

    Version 2510 (Build 19328.20244)

    Original source Report a problem
  • Nov 20, 2025
    • Date parsed from source:
      Nov 20, 2025
    • First seen by Releasebot:
      Nov 21, 2025
    • Modified by Releasebot:
      Dec 4, 2025

    Microsoft 365 by Microsoft

    Version 2510: November 20

    Version 2510 (Build 19328.20244)

    Resolved issues

    Outlook

    • We fixed an issue that caused users to see "Contacting the server for information" repeatedly when loading some emails.
    Original source Report a problem
  • Nov 18, 2025
    • Date parsed from source:
      Nov 18, 2025
    • First seen by Releasebot:
      Nov 19, 2025

    Microsoft 365 by Microsoft

    Version 2510: November 18

    Version 2510 (Build 19328.20232)

    • Various fixes to functionality and performance.
    Original source Report a problem
  • Nov 4, 2025
    • Date parsed from source:
      Nov 4, 2025
    • First seen by Releasebot:
      Nov 5, 2025
    • Modified by Releasebot:
      Dec 4, 2025

    Microsoft 365 by Microsoft

    Version 2510: November 04

    Version 2510 (Build 19328.20178)

    Resolved issues

    Outlook

    • We fixed an issue where @mention searches produced no results in Office apps.
    Original source Report a problem
  • Oct 30, 2025
    • Date parsed from source:
      Oct 30, 2025
    • First seen by Releasebot:
      Oct 31, 2025

    Microsoft 365 by Microsoft

    Version 2510: October 30

    Version 2510 (Build 19328.20158)

    Feature updates

    • Excel

      • New Get Data dialog in Excel for Windows: Discover a new way to connect to data! The Get Data dialog in Excel for Windows makes finding and using external data sources faster, smarter, and more intuitive.

    • Insights Services

      • Analyze Data is now found in the Data tab: Continue getting insights from Analyze Data from the Data tab in the ribbon.

    Resolved issues

    • Outlook
      • We fixed an issue that prevented users from downloading web add-ins in some virtualized environments.
    Original source Report a problem
  • Oct 14, 2025
    • Date parsed from source:
      Oct 14, 2025
    • First seen by Releasebot:
      Oct 14, 2025

    Microsoft 365 by Microsoft

    Version 2509: October 14

    Version 2509 (Build 19231.20194)

    • Various fixes to functionality and performance.

    Security updates listed here

    Original source Report a problem
  • Oct 1, 2025
    • Date parsed from source:
      Oct 1, 2025
    • First seen by Releasebot:
      Oct 2, 2025

    Microsoft 365 by Microsoft

    Version 2509: October 01

    Version 2509 (Build 19231.20156)

    Resolved issues

    Excel

    • We fixed an issue where ribbon controls were not rendered when rejoining Office sessions in a virtual machine, Azure Virtual Desktop, or remote desktop environment.

    Outlook

    • Fixed an issue that caused Outlook to terminate unexpectedly when starting.
    Original source Report a problem

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