Open Outlook – Go to the file menu – choose open – then choose import and export

Choose Import from another program or file

Choose Personal Folder File (.pst) and click Next

Highlight Mailbox – yourname or Personal Folders and check the box for Include Subfolders

Click Browse and choose the backup.pst file from your saved location, click Finish

Click Ok, a progress window should appear. Once it has gone away close Outlook.

Confirm that the backup.pst file was imported correctly