Outlook - Removing Email Account from iPhone and iPad

To remove an email account from an Apple iPhone and iPad. (note this will remove all email data from your mobile device including any synchronized calendar data.) 

1. Verify your device's wireless data connection is active (open Safari web browser and enable to browse the Internet).
2. Tap Settings > Mail > Accounts>
3. Select account needing to be removed. 
4. Select Delete Account and confirm Delete Account.