How to migrate autocomplete entries in Outlook 2016?

I have moved the customer's Outlook 2016 setup from the old computer to the new computer.  This is from Office 365, and is an imap setup.  He had no contacts.  In the past I would move over the .nk2 file for autocomplete entries, but in this case I can't find a .nk2 file.  How do I get his autocomplete entries on to the new computer?  TIA