Microsoft continues to enhance the new Outlook for Windows, delivering a series of updates designed to improve user experience, performance, and security. The latest release notes, as of June 27, 2025, highlight several key enhancements:
Improved Offline Functionality
The new Outlook for Windows has expanded its offline capabilities. Users can now create, move, and delete folders while offline, and access attachments without an internet connection. Additionally, the default mail sync window in offline mode has been extended from 7 days to 30 days, ensuring better access to recent emails when the device is disconnected.
Enhanced Keyboard Navigation
Microsoft Learn states that users now have the option to control the display of key tips on the ribbon when pressing the Alt key, facilitating more efficient keyboard navigation.
Copilot Integration
Outlook's integration with Microsoft Copilot has been enhanced. Users can now summarize PDF, Word, and PowerPoint attachments directly within Outlook, streamlining the information processing process. Furthermore, Copilot features are available across all connected email accounts for users with access through Microsoft 365 Personal or Family subscriptions.
Bug Fixes and Performance Improvements
Recent updates have addressed several issues, including unexpected application exits when loading web add-ins and the unintended display of the Copilot icon when disabled by administrators in government cloud environments.
These updates reflect Microsoft's commitment to refining Outlook for Windows, ensuring it meets the evolving needs of users in various work environments. For detailed information on all recent changes, users can refer to Microsoft’s official release notes.