Microsoft has released Windows 11 Build 25163 in the Dev Channel, which improves the overflow taskbar feature. Install Build 25163 to discover and share files with more devices via the built-in Windows sharing window.
Microsoft is said to have pulled Windows 11 23H2 to focus on smaller feature updates. As a result, features included in Build 25163 may reach production channels earlier than expected.

Microsoft confirmed that Windows 10 is not the last version of Windows, and that Windows 11 will replace Windows 10 next, basically confirming that Windows 12 is real.
Microsoft plans to cancel Windows 11 23H2 in the future. In other words, features included in Build 25163 should be released earlier than expected.
What’s New in Windows 11 Build 25163
Windows 11 Build 25163 reintroduces the much-anticipated taskbar overflow UI.

Windows 11’s taskbar easily adapts to any form factor, and Build 25163 introduces a new overflow state that allows you to view overflowing apps in one space. Click the arrow icon to view applications that may not appear on the taskbar by default due to limited space.
The overflow UI is an entry point that lets you view all overflow apps in one space. You can also pin apps, access jump lists, and extend the UI, which you can close by clicking outside the overflow pane or navigating to the app.
In addition to the taskbar upgrade, Build 25163 also improves the nearby sharing experience. Nearby Share works through Explorer, Photos, Xbox, and other Windows apps that use the built-in Share window.

File sharing features have been updated to UDP and Bluetooth to discover more nearby devices. Therefore, more files can be found and sent to the device using the file sharing feature.
Another new addition is support for sharing local files to OneDrive. You can upload files directly to OneDrive by selecting any file in File Explorer or other applications that use the built-in sharing UI, and then selecting OneDrive.
This OneDrive upload feature works without switching apps or opening the native OneDrive client. But right now it only works with Microsoft accounts.
Windows 11 Build 25163 improvements:
Microsoft fixed an issue where explorer.exe could crash when you drag a tab.
Microsoft fixed an issue where dividers in the Navigation Pane of File Explorer suddenly disappeared.
Microsoft has fixed an issue where closed tabs could reappear in File Explorer.
Microsoft fixed an issue where tab rows could expand vertically unexpectedly.
How to install Windows 11 Build 25163
- Sign up for the Windows Insider Program.
- Open the Settings page.
- Switch to the dev channel.
- Click “Check for Updates” and select “Download and Install”.
- Click “Restart Now”.