This article explains how to change the name of your email sender in Outlook. This is the name that your recipient sees in the From: field. We'll also cover changing the sender while composing an email, and changing your reply-to address. Instructions apply to Outlook 2019, Outlook 2016, Outlook 2013, and Outlook for Microsoft 365.
To change the sender name when sending an email in Outlook:
Go to File and select Info.
Select Account Settings > Account Settings.