
Outlook only exports contacts as CSV and OLM file format while iCloud only allows users to import vCard format contacts.
Brief introduction about vCard, CSV and OLM
Help you directly export all or selected Outlook contacts to iCloud. Let you backup/restore contacts with a click. Find and delete/merge duplicate contacts. Let you easily view, search, edit, group, tag, share, print and sync contacts. Import contacts from vCard and CSV files. Export/convert contacts to 8 formats: CSV, Excel, vCard, TXT, etc. Let you easily transfer contacts between supported sources. Support contacts from various sources: Outlook, iCloud, Mac, Gmail, etc. Cisdem ContactsMate 1 Click to Export Outlook Contacts to iCloud on Mac