Fix Microsoft 365 App Crashing When Opening Word Documents on iPhone/iPad
Question details
The user needs to resolve an issue where the Microsoft 365 app repeatedly crashes upon opening a specific, heavily formatted Word document.
- Product
- Microsoft 365
- Device & OS
- iPhone / iPad (iOS)
- Scenario
- Attempting to open a large, heavily formatted Word document (approximately 3,200 words) that displays correctly in the OneDrive preview.
- Observed behavior
- The Microsoft 365 app quits unexpectedly or crashes entirely when trying to load and render the document.
Check your available device storage and close all background apps on your iPhone or iPad to ensure the system has enough active memory (RAM) to process heavy document formatting.
Uninstall and Reinstall the Microsoft 365 App
A clean installation can clear corrupt app cache, reset local rendering engines, and resolve recurring crashes on iOS devices.
When an app crashes on specific files across multiple iOS devices, the local app installation or its cached data might be corrupted. Reinstalling the app forces your device to download the latest, optimized version from the App Store.
Locate the Microsoft 365 app icon on your iPhone or iPad home screen. Press and hold the icon until a menu appears, tap 'Remove App', and confirm by selecting 'Delete App'.
Open the App Store on your device, search for 'Microsoft 365', and tap the cloud download icon to reinstall the application.
Launch the newly installed Microsoft 365 app, sign back into your Microsoft account, and allow your OneDrive files to sync.
Navigate to the heavily formatted Word document and tap to open it to see if the crash is resolved.
Contact Microsoft Support for File-Specific Bugs
If reinstalling does not work, the document's specific formatting may be triggering an iOS-specific rendering bug that requires Microsoft's technical intervention.
Open Heavily Formatted Word Documents Smoothly with WPS Office
If Microsoft 365 continues to crash on your iPhone or iPad, WPS Office provides a highly compatible and stable solution. It is designed to handle complex layouts and large files without overwhelming your mobile device's memory.
Frequently Asked Questions
Why does Microsoft 365 crash when opening large Word files on an iPhone?
Crashes typically happen when the device runs out of active memory (RAM) while trying to process heavily formatted elements like high-resolution images or complex tables. It can also be caused by a corrupted app cache or a bug in the current app version.
Can I recover my Word document if Microsoft 365 crashes while editing?
Yes, if AutoSave is enabled, your recent edits are automatically synced to OneDrive. You can retrieve the latest version by opening the file from OneDrive on a different device or using a web browser.
How can I edit my Word document if the Microsoft app keeps crashing?
If the native app is failing, you can edit your document using Office Online via a web browser, or you can download a highly compatible third-party alternative like WPS Office from the App Store to open and edit the file without crashing.
