Use aliases to add email addresses to your Microsoft account

An alias is an additional email address for your Microsoft account. It uses the same inbox, contact list and account settings as the primary alias. You can sign in to your account with any alias – they all use the same password. You can send emails from an alias whether you’re using an email app such as Outlook or a device such as a phone.

An alias is also the best way to change your email address, but keep all your emails. Add an alias, then make the new alias primary. Then you can keep or remove the original alias. If you have a @hotmail.com, @live.com or @MSN.com email address and would like to add a new email address, the best way is to add an alias.