Step 1. Click the File tab in Outlook
Step 2. Click on Open
Step 3. Click on Import
Step 4. In the Import and Export Wizard, Click on Import from another program or file, and then click Next
Step 5. Click on Outlook Data File .PST and then click Next
Step 6. Click on Browse, then choose the file to import ( Please Note under Options, It would be recommended that you click Do Not Import Duplicates unless you want the imported information to be replaced or duplicate items in Outlook ) Click Next after
Step 7. Set Options for Importing items. The Default settings usually don't need to be changed.
Personal Folders, Outlook Data File , or your email address is selected Automatically. Include Subfolders is selected by Default. All folders under the folder selected will be imported. The default selection of Import items into the same folder in the matches the folders from the imported file to the folders in Outlook. If a folder does not exist in Outlook, one will be created.
Step 8. Click on Finish