Prepare contacts for importing into Outlook Whatever the reason, Outlook provides a straightforward way to import all your contacts in one go. For example, you inherited an external database with a list of contacts, or you are migrating from another mail server, or perhaps you are setting up a new account.
There may be different reasons why you may want to transfer contacts into your Outlook address book.
pst file, and shows how to transfer contacts to Outlook Online. This tutorial talks about two ways to import contacts into Outlook desktop, from.