Outlook - Removing an Auto Complete Entry

Open your Outlook and navigate to the New Mail button at the top left.

Click it and go to the"To" Field.

 

Type the name of the email or user that you would like to remove and when the entry comes up hover over it. 

When you hover over the entry there should be an X that appears.

Click the X and that will remove that specific entry of the user from your auto complete list.