Office Settings & Configuration

Fix Microsoft 365 Window Opening with Incorrect Size on Windows 11

Algirdas Jasaitis Sep 28, 2026 872 views

Question details

The user is looking for a way to fix the Microsoft 365 application window which opens wider than the screen and too short, persisting even when attempting to manually resize or use Snap Groups.

Fix Microsoft 365 Window Opening with Incorrect Size on Windows 11

Product: Microsoft 365
Device & OS: Windows 11
Scenario: Launching the Microsoft 365 app or using Snap Groups on lower resolution displays.
Observed behavior: The application window opens with an incorrect width that is wider than the screen. The height can be adjusted, but the width remains locked or restores incorrectly after maximizing. Repairing the app or tweaking the registry does not resolve the issue.

Before you start

Verify your current display resolution and scaling settings in Windows 11, as this rendering issue primarily affects lower resolution screens such as 1366x768 and 720p.

Solution 1Recommended

Adjust Display Resolution and Scaling

Since the incorrect window size is triggered by lower display resolutions, switching to a higher resolution or adjusting Windows scaling can prevent the application from stretching wider than the screen.

Testing indicates that the Microsoft 365 window bug occurs primarily at 1366x768 and 720p resolutions, but is not present at higher resolutions such as 2560x1600. If your hardware supports it, increasing the resolution is the most effective solution.

Open Display Settings

Right-click on an empty area of your Windows 11 desktop and select 'Display settings' from the context menu.

Change Display Resolution

Scroll down to the 'Scale & layout' section. Click the dropdown menu next to 'Display resolution' and select a higher resolution if your monitor supports it.

Adjust Scaling Settings

In the same section, check the 'Scale' dropdown and set it to the 'Recommended' percentage (usually 100% or 125%) to ensure apps render their windows correctly.

Hardware Limitations: If you are using a laptop or monitor with a maximum resolution of 1366x768, you may not be able to increase the resolution. In this case, you will need to rely on maximizing the window as a temporary workaround until Microsoft patches the app.

Solution 2

Maximize Window and Report the Issue

If you cannot change your display resolution, maximizing the app window serves as a functional temporary workaround while you report the bug to Microsoft.

Free Microsoft Office alternative

Try WPS Office for a Flawless Display on Any Screen Resolution

If Microsoft 365 continues to have window scaling and sizing issues on your Windows 11 device, consider switching to WPS Office. It provides a lightweight, highly compatible alternative that adapts perfectly to screens of all sizes and resolutions without layout bugs.

1. Download and Install: Visit the official WPS Office website and download the free installer for Windows.
2. Open Your Documents: Launch WPS Office and open your existing Word, Excel, or PowerPoint files without worrying about formatting loss.
3. Enjoy a Bug-Free Layout: Work seamlessly across multiple windows and Snap Groups without encountering the window sizing bugs found in other suites.

Fully compatible with Microsoft Word, Excel, and PowerPoint file formatsOptimized to display flawlessly on both lower (720p) and high-resolution monitorsLightweight architecture that consumes significantly fewer system resourcesFree to use with a familiar, easy-to-navigate user interface

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Frequently Asked Questions

Why does my Microsoft 365 app open wider than the screen on Windows 11?

This is a known software scaling issue related to how the Microsoft 365 app handles lower display resolutions on Windows 11, specifically affecting devices running at 1366x768 or 720p.

Can I fix the window width by repairing the app or editing the registry?

No. Extensive user testing has shown that running the Microsoft 365 repair tool or modifying Windows registry keys does not fix this specific window width issue.

Will keyboard shortcuts help resize the oversized window?

Keyboard shortcuts are ineffective for this bug. Attempting shortcuts like Windows key + Spacebar typically only opens the Start menu or moves the page without altering the window size.

How do I report this Microsoft 365 scaling bug?

You can report the issue directly to Microsoft by pressing the Windows key + F to open the Feedback Hub. Be sure to include your exact display resolution, Windows 11 version (e.g., 23H2), and Microsoft 365 build number.

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