Account Name
Your Account Name is found close to the buttons at the right side.
Account Name here is the name of the email you are signed in with in your computer system.

When you click on this account, it displays a box under it, showing you option to sign out, with two links to your Microsoft account and user info. And lastly at the bottom is an option to sign into another account, all of which are clickable.


I am using the Ms-Excel that has the account name Daniel Uchenna. Yours will have your own name if you are signed in. If you are not signed in, it will display a sign in button for you to click and sign in.