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Introduction
The Microsoft Outlook app not working can be caused by a server outage or a local device problem. If today’s global outage is affecting you, wait for Microsoft’s fix. If the app is malfunctioning on a normal day, try the steps below. First, verify whether it is a server issue using our guide to checking Outlook status .
Mobile App Crashes or Freezes
Force‑stop the app and restart it. If that does not work, clear the app cache. On Android, go to Settings > Apps > Outlook > Storage > Clear Cache. On iOS, offload the app and reinstall it. Ensure you have the latest version from the App Store or Google Play.
For sign‑in errors specifically, see our Outlook sign‑in error fixes .
Desktop App Won’t Load or Sync
Try repairing the app. Go to Settings > Apps > Apps & features, find Microsoft Office or Outlook, and select “Modify.” Choose “Quick Repair.” If that fails, try “Online Repair.” Ensure your Windows is up‑to‑date. Outdated software can cause compatibility issues.
Incorrect Date and Time Settings
An often‑overlooked cause of Microsoft Outlook app not working is an incorrect system clock. Authentication servers rely on accurate timestamps. Set your device’s date and time to update automatically. In Windows, go to Settings > Time & Language > Date & time, and toggle “Set time automatically” on.
Conclusion
If the Microsoft Outlook app not working during an outage, patience is key. Avoid reinstalling unnecessarily. On normal days, the steps above resolve most issues. For a broader view of Microsoft’s reliability, see our Microsoft 365 outage history .
