Migrate Autocomplete for Contacts in Outlook
Look for files inside: c:\Users\Common User\AppData\Local\Microsoft\Outlook\RoamCache\
As explained: [Outlook’s Auto-Complete or Nickname Cache, *.NK2)](https://www.slipstick.com/outlook/email/understanding-outlooks-autocomplete-cache-nk2/
There are excellent tools for this like NK2Edit and its accompanying module, NK2 Control Center.