Outlook Mobile App Not Working

Applies to: Outlook for iOS, Outlook for Android

Quick answer: Force close and reopen the app, check notification settings if mail's arriving silently, and update the app through your app store — outdated versions are a common, overlooked cause.

1. Force close and reopen the app

iPhone: swipe up from the bottom and hold, then swipe Outlook away. Android: open Recent Apps and swipe it away. Reopen and give it a minute to catch up.

2. Check notification settings

If mail's arriving but you're not being told about it:

  1. Phone Settings → Notifications → Outlook → confirm notifications are allowed.
  2. Inside Outlook: Settings → Notifications → confirm the account has them turned on and isn't set to "Focused inbox only" if you want alerts for everything.

3. Clear the app's local cache

Android: Settings → Apps → Outlook → Storage → Clear Cache.
iPhone: there's no direct cache clear here — sign out of the account inside Outlook and back in instead (step 4 below).

4. Remove and re-add the account

  1. Inside Outlook: tap your profile picture → Settings → select the account → Delete Account.
  2. Restart the app, then add the account again and complete sign-in fully, including any permission prompts you'd normally skip past.

5. Update the app

Outlook mobile updates frequently to keep up with providers changing things on their end. Check the App Store or Play Store for a pending update — an outdated version is one of those causes that's easy to overlook and surprisingly common.

Mail loads fine on the Outlook.com website but not in the app? The problem's local to your phone (steps 3–5 above), not your account.