If you are moving from another email account or email provider you can use the Import feature of Outlook to migrate your email data.
Follow the steps below to import data to Outlook. We recommend for safety if you’re currently using Outlook to download a backup copy before performing this import.
Note: Before performing this import we recommend that you disable Cached Exchange Mode.
Import data to Outlook 2010
After the import is complete, you can enable Cached Exchange Mode again.
For exporting your data files see How to Export Data in Outlook 2010.