Import Contacts onto Outlook Mail

When you have to set up a new email account on Outlook, you would like to import Contacts from - say - Live mail or Thunderbird or even Windows People, but without success.
This happens because of a bug in some versions of Outlook. There're several guides in the sequence to follow, like this good one.
But also when you do all the required steps, the Outlook Contact list remain desolately empty. Why?

Because of this step: You need to map the fields, in order to achieve the goal.

Sequence:
  - Export From People in Windows.
  - Import into Outlook 2016 via the File menu function (other versions may have other names).
  - Enter settings in procedure and Map the Fields you need (Name, E-mail ecc.)

IT: Per Mettere i Contatti su Outlook bisogna Mappare i Campi.