Open Settings
Tap the Settings app on your device.- Scroll down to Apps
Swipe down until you see Apps, then tap it. - Find and Tap “Mail”
Scroll through the list and select the Mail app. - Tap “Mail Accounts”
You’ll see a section called Mail Accounts—tap it. - Select Your Email Account
You might have named it something different, but in this example, it’s called Exchange. Tap on the account you want to delete. Scroll Down and Tap “Delete Account”
At the bottom of the screen, tap Delete Account.Confirm Deletion
Tap Delete Account again to confirm.If everything was done correctly you shouldn't see the account, you wanted deleted.