This article explains how to add your Yahoo Mail account to Outlook for Microsoft 365, Outlook 2019, Outlook 2016, Outlook 2013, and Outlook 2010.
Set up your Yahoo account so that Outlook can connect. This first step depends on whether you have two-step verification enabled on your Yahoo account.
If your Yahoo account is secured with two-step verification, generate a password for a third-party app. You'll use this in place of your Yahoo Mail login password when you set up Outlook.
If you don't use two-step verification to secure your Yahoo Mail account (and you don't want to enable it), set up your account so that email clients can access your Yahoo Mail account using the password you use to log in to your Yahoo account.