Back to Microsoft 365
Llamaha icon

Microsoft 365 Application

Outlook Mobile

Use this guide when you need help setting up Outlook on your phone or when work email, calendar, and notifications are not appearing correctly in Outlook Mobile.

Reviewed April 2026

Application Guide

Overview

Outlook Mobile gives you work email and calendar access on an iPhone or Android phone.

Most setup problems happen when the wrong account is added, the phone blocks notifications or background refresh, or company sign-in steps were not completed during setup.

Plain English

What this app is usually used for

Mobile work email and calendar access on iPhone or Android, where account choice, device registration, and app permissions matter most.

It is part of the Microsoft 365 family covered in our app help.

Common problems

Common problems

The work account will not finish signing in

Outlook Mobile keeps looping on sign-in, returns to the account picker, or never reaches the inbox.

Likely fix

Restart the app, confirm the same account works in the browser, and retry setup with the exact work account email.

What to collect

Send a screenshot of the last sign-in screen, the work email account used, and whether browser access works.

Mail or calendar is missing on the phone

The app opens, but mail folders, calendar items, or a shared mailbox do not match what you see elsewhere.

Likely fix

Check whether the same content appears in Outlook on the web and let the phone stay open for a few minutes to finish syncing.

What to collect

Send the mailbox or calendar name, what should be visible, and a screenshot of the missing content.

Notifications are not showing

Outlook Mobile receives mail, but you do not see new-message or calendar alerts on the phone.

Likely fix

Check phone notification settings, Outlook Mobile notification settings, and whether battery saver or focus modes are blocking alerts.

What to collect

Send the phone type, Outlook app version, and a screenshot of the phone notification settings if possible.

First things to try

First things to try

Quick checks before you change anything

  • Are you setting up Outlook Mobile for the first time, or did it stop working after a phone change, password change, or app update?
  • Is the problem mail setup, calendar access, notifications, or shared mailbox visibility?
  • Can you sign in to the same mailbox in Outlook on the web or on your computer?

Try these fixes first

  • Confirm the phone has a working internet connection before you retry setup.
  • Check that Outlook Mobile is signed in with the same work account you use on your computer.
  • If notifications are missing, check both the phone notification settings and the Outlook in-app notification settings.
  • If only one shared mailbox is missing, compare that mailbox to Outlook on the web before removing the mobile app.

Slow down

Do not do this yet / warnings

Avoid these until support says it is safe

  • Collect exact error wording, organization, affected apps, web-versus-desktop behavior, and recent password, multi-factor sign-in, or device changes before Tier 2 takes over.
  • Do not reset OneDrive or recreate Outlook profiles until permissions, licensing, and organization selection are confirmed.

What support needs

What details support needs

Send these details

  • A screenshot of the exact Outlook Mobile setup or sign-in screen.
  • The work email account you are trying to add.
  • The phone type and whether it is iPhone or Android.
  • A note about whether the same mailbox works in Outlook on the web or on your computer.

Licensing & access

Licensing / access notes

Licensing / access checks

  • Make sure you are adding the work email account your company expects you to use.
  • If your company uses mobile app protection or device approval, finish those prompts before assuming setup failed.
  • If the mailbox works in Outlook on the web but not on your phone, include that when you contact support.

More checks

More setup checks

Install / update basics

  • Install Outlook from the App Store or Google Play, then open it and choose Add Account.
  • Use your work email address and complete any Microsoft sign-in, approval, or device-registration prompts that appear.
  • Allow notifications, calendar access, and contacts only if your company expects you to use those features on your phone.