Click the small triangle to the left of the Inbox to show or hide the sub-folders. All of your folder (and sub-folders) are indented under the Inbox.Click the small triangle to the left of your account name to show or hide the folders within your account. Your account name will be listed in the left-hand column of the window.Here are a few tips for using Outlook 2016 with setup as an IMAP account: You’re finished! Try sending yourself a test email message to make sure it works. Type the email password you chose when you created this email address, then click Connect.