- Open Outlook.
- Click the File tab > Account settings > Account settings.
- Highlight your current IMAP account and click Change.
Note: The window that opens will tell you what type of email account you have. (Look under Type.)
- Choose More settings and click on Advanced.
- You should see a check box titled: Leave a copy of messages on the server.
- Unchecking the box will move them off the server when "called" by the email client.