Remove a Name or Email Address From the Outlook Autocomplete List
Outlook remembers every address you enter in the To, Cc, and Bcc fields of an email message. Then, when you enter the first few letters of a name or email address, Outlook automatically suggests contacts that match. If Outlook remembers mistyped and old contacts that you don’t want to appear in the autocomplete list, get rid of those entries. To delete a single contact from the autocomplete list:
Delete All the Addresses From the Outlook Autocomplete List
To clear the autocomplete list of all entries in Outlook 2019, 2016, 2013, and 2010:
Stop Outlook 2007 From Suggesting Recipients
To turn off the autocomplete list in Outlook 2007:
Remove an Address From the Autocomplete List in Outlook.com
Outlook.com draws its autocomplete suggestions from multiple sources. If you don’t want to see an entry in the autocomplete list, delete the email address from the contact entry.
