To sign out of the Outlook mobile app, you must remove your account from the app rather than look for a universal "Sign Out" button. Microsoft designed the app this way, so the correct action to sign out of Outlook mobile is to delete the account from the device, which removes your emails, contacts, and calendar from the app while keeping them safe on the server.
Why there's no 'sign out' button in the Outlook mobile app
Microsoft did not include a standard "Sign Out" button in the Outlook mobile app because the intended method to end a session is to remove the account entirely. This approach ensures that all locally cached data is cleared from the device, which is important for phone data and storage management. When you remove the account, the app no longer has access to your information, providing the same security result as a traditional sign-out.
How to sign out of Outlook on Android
- Open the Outlook app on your Android device.
- Tap your profile icon or avatar at the top left of the screen.
- Tap the gear icon to open Settings.
- Under Mail accounts, select the account you want to remove.
- Tap Remove Account and confirm the action.
After completing these steps, the account is removed from the app and you are signed out. If you prefer a more forceful method, you can also go to your phone's Settings > Apps > Outlook > Storage and clear the cache and data. This forces Outlook to forget your sign-in information, though it also deletes any locally stored settings and emails. Clearing app data on Android deletes any locally stored emails and settings, so back up important data before proceeding. On Android or Chromebooks in Microsoft 365/Office apps, from the Recent screen tap the person icon, tap your name, then tap Sign Out twice to confirm. Reinstalling the Outlook app also forces a sign-out by uninstalling and reinstalling from the app store.
How to sign out of Outlook on iPhone and iPad
- Open the Outlook app on your iPhone or iPad.
- Tap Account (or your profile icon).
- Tap the account that is currently in use.
- Tap Sign Out twice to confirm the action.
This is Microsoft's documented flow for signing out of Microsoft 365 and Office mobile apps on iOS. After the second confirmation, the account is removed from the device and you are signed out.
What happens when you remove your account
When you remove your account from the Outlook mobile app, your emails, contacts, and calendar events are deleted from the device only. All of your data remains intact on the server and is still accessible through Outlook on the web or any other device where you remain signed in. Your email account itself is not deleted or deactivated; you can add it back to the app at any time by signing in again.
Frequently Asked Questions
Do I need to sign out on each device separately?
Yes. Signing out of the Outlook mobile app on one device does not affect your session on other devices. Each device maintains its own independent connection, so you must remove the account from every phone or tablet where you want to end the session.
Can I set the app to sign out automatically after inactivity?
No. The Outlook mobile app does not include an automatic sign-out feature based on inactivity. You must manually remove the account or clear the app data to end your session.
What should I do if the remove account option is greyed out?
If the remove account option is unavailable, try restarting the app or your device. If the issue persists, clearing the app data through your phone's system settings (Settings > Apps > Outlook > Storage > Clear Data) can force the account to be removed.
Will removing my account from the app delete my emails permanently?
No. Removing the account only deletes the locally stored copy of your emails from the device. Your emails remain safe on the server and can be accessed again by signing back into the app or using Outlook on the web. Signing out through the web version of Outlook (outlook.com) will also sign you out of the mobile app.
