Choose Tools | Email Accounts > View or change existing directories or
address books. Select Outlook Address Book, then click Change. You'll see
choices for using First Last or the File As field, which is set by default
to Last, First.

If you want to include the company name in the File As field property or use
a different order, you'll see your choices listed in Tools | Options |
Contact Options. Making a change there affects only new contacts that you
add after the change.