Microsoft Office Excel
Go to the Contact List tab and access the desired list. Click on the Add Contacts button on the left hand menu.
You will be asked to confirm that you have permission from the recipient(s) to add them to your list. Click on the checkbox and go to the next step.
Select Excel from the left hand menu and click on
Browse to grab the file from your computer.
Note: XLS format is the only format accepted. XLSX will not work. All files must be created on Excel 97 and above.