Your Account Settings page allows you to add or change email addresses, as well as change your email notifications. By default, your primary email is set to your @army.mil email address.

It works as an email client for your Windows PC. On the other hand, Outlook.com is a website that allows users to use Microsoft accounts only. How do I change settings in Outlook desktop app?

You can even change your default email app on your ... you'd be wise to tweak your email notification settings to reflect it.

Change default iPhone and iPad apps under Settings > Apps > Default Apps. Options include browsers, messaging, contactless apps, and autofill setups for password managers. You can't pick a new default ...