I have recently come across an informative article that outlines the two major techniques to import iCloud contacts to Outlook. One can either opt for the manual method or can use the advanced and secure Cigati iCloud Email Backup Tool, which is also introduced in the article.

 This iCloud Email Backup Tool empowers users to export iCloud data into multiple file formats such as PST, MBOX, EMLX, JSON, PNG, etc. It further provides an option to remove duplicate emails from the migration process and automate backups as per the user's selected time interval. For more comprehensive insights into this tool, I recommend exploring the detailed article.