To set up your email address
Sign in to your work or school account and then go to your https://myprofile.microsoft.com/page.
Select Security info from the left navigation pane or from the link in the Security info block, and then select Add method from the Security info page.
On the Add a method page, select Email from the drop-down list, and then select Add.
On the Email page, type your email address (for example, email@example.com), and then select Next.
This email address can't be your work or school email.
Type the code sent to your specified email address, and then select Next.
Your security info is updated and you can use your email address to verify your identity when using password reset.