How do I delete auto-complete email addresses in Outlook?Up to Table of Contents
Outlook captures email addresses that you've previously typed or replied to in its auto-complete feature. It doesn't store them as proper Contacts, but when you start to type an email address in the TO, CC, BCC fields, it accesses this autocomplete list.
To remove these autocomplete entries, simply begin typing the email address in the TO, CC, BCC field. Scroll to the one you want to remove, and press DELETE on your keyboard.