Exporting Email Items to a PST in Outlook Note:  Exporting and importing a mailbox using a .pst file isn't supported in new Outlook at this time. If you're already using new Outlook, you'll need turn off the  New Outlook toggle and switch back to classic Outlook. Before you begin Before you start your export, there's a few things you should do to make sure your export goes smoothly. Do a mailbox cleanup: i.e delete junk email before beginning. By default, Outlook is set to download email for the past 1 year . If you want to export all your emails, please ensure you open  Outlook , select  Account settings  >  Account Name and Sync Settings  and move the slider to  All . After changing this slider, please allow an hour for all emails to be downloaded before continuing.   A video of the below guide can be found on the Microsoft website . Begin exporting email, contacts, and calendar items from Outlook to a .pst file At the top of the ribbon in classic Outlook, choose  File . Choose  Open & Export  >  Import/Export . Choose  Export to a file  >  Next . Click  Outlook Data File (.pst)  >  Next . Select the name of the email account to export, as shown in the picture below. Only information for one account can be exported at a time. Make sure that the  Include subfolders  check box is selected. This ensures that everything in the account will be exported: Inbox, Calendar, Contacts, and Tasks. Choose  Next . Click  Browse  to select where to save the Outlook Data File (.pst). Enter a  file name , and choose  OK  to continue. Note:  If you’ve used export before, the previous folder location and file name appear. Type a  different file name  before choosing  OK . If you are exporting to an existing Outlook Data File (.pst), under  Options , specify what to do when exporting items that already exist in the file. Choose  Finish . Outlook begins the export immediately unless a new Outlook Data File (.pst) is created or a password-protected file is used. If you’re creating an Outlook Data File (.pst), an optional password can help protect the file. When the  Create Outlook Data File  dialog box appears, enter the  password  in the  Password  and  Verify Password  boxes, and choose  OK . In the  Outlook Data File Password  dialog box, enter the  password , and choose  OK . If you’re exporting to an existing Outlook Data File (.pst) that is password protected, in the  Outlook Data File Password  dialog box, enter the  password , then choose  OK .