Step. I. Login to the webmail interface, Click on the 'Address' icon on the Right Top Panel.
Step. II. Click on the 'Import' Icon
Step. III. 'Import Contacts' page appears. Click on the 'Choose File' button to select the file (either in csv or vCard format) from your computer.
Step. IV. After selecting the file, Click on the 'Import' button. You can Select 'Replace entire address book' check box in case of recreating the whole address book. If you are adding more address to existing address book, keep it un checked.
Step. V. After the completion, you will get the details of address that are imported.