This article will show you how to change the downloaded mail for the past.
In the ribbon of your outlook Application.
Click on the 'File" tab.
Click on "account Settings".
In the Drop-Down Window, click on "Account Settings".
Double click the email you wish to modify.
Adjust the slider to modify the value of the downloaded emails for the past period.
Click "Next".
In the new window, click "Done"
Give it some time to sync the emails to your Inbox.