After you send the email, you should be able to see the new display name once the test email is received. Keep in mind that if your Outlook account is hosted via Microsoft Exchange, like many ...

Outlook will let users create custom account icons for their profiles, as a way to distinguish between accounts.

If Outlook recognizes your email account, it will ask you to enter your ... you may need to specify the incoming and outgoing email server names, port numbers and encryption methods.