Using Classic Outlook on Windows for personal email, calendar, and contact management
It eventually dawned on me the icloud.com email address has the
2-step verification process by default now. To resolve issue go to this url https://appleid.apple.com/signin and login your with your apple id/icloud account. Look for a place to "Generate an APP specific key code" Fill in the name of just for your reference for example outlook and press key to continue. A key code will be generated that looks like rtve-xxxg-letm-einr . This time when following the procedure for this thread put the key that was generated in place of your password.