Can't use excel or outlook mobile apps

Since updating the apps/device, clearing cache, reinstalling the apps, and reinstalling WebView have already been tried, the next supported steps are:

1. Update Android System WebView and Google Chrome from the Play Store, then restart the phone.
   • Outlook mobile uses Android WebView for sign-in pages.
   • If WebView or Chrome is outdated, Outlook can crash or fail to render the sign-in page correctly.
2. Test the Microsoft account sign-in outside the app in a browser.
   • For Microsoft 365 apps, verify the username and password in a browser using the correct Microsoft 365 sign-in location.
   • For Outlook with a personal Microsoft account, use the sign-in helper tool to detect account issues.
   • If browser sign-in works but the app still shows a blank screen, the issue is likely app/device-side rather than the account itself.
3. In Outlook mobile, try a local account reset.
   • Open Outlook > Settings > select the email account > Reset Account.
   • This is the documented reset step when the app shows incomplete or incorrect data.
4. If Outlook is crashing on launch, remove and reinstall the app again after updating WebView and Chrome.
   • Microsoft’s Outlook mobile troubleshooting guidance specifically says to clear the browser cache on the device, then remove and reinstall the app.
5. If this is a work or school account used with Microsoft 365, use self-service password reset if allowed, or contact the Microsoft 365 admin/technical support.
   • Outlook mobile guidance states that work or school account issues may need admin or technical support.
6. If the issue is on Excel and other Microsoft 365 mobile apps as well, confirm the correct account is being used and that sign-in works in a browser.
   • Also verify the device meets app system requirements.

For the current symptoms, the strongest next path is:

• update Android System WebView and Google Chrome,
• restart the device,
• verify sign-in in a browser,
• then in Outlook use Settings > account > Reset Account.

If the blank white screen continues for a work or school account after that, escalation to the Microsoft 365 admin or technical support is the supported next step.

• Android WebView Crash
• Can't sign in to the Outlook mobile app
• How do I clear the cache or locally reset/refresh the client/app?
• Troubleshoot Outlook mobile issues
• What you can do in the Microsoft 365 apps on mobile devices with a Microsoft 365 subscription