Sending, receiving, and organizing email in Outlook.com
Hello,
Find the partial email address of the username (Email address) using the recovery information.
Go to this link: https://account.live.com/username/recover
Use your Security phone number or the email address associated with your account.
Microsoft will then show a hint of the username. Try recalling the username you created.
(OR) Check whether you’ve signed in with this Microsoft account on any of the services, such as Office 365 apps, the Outlook app, or Windows. You can also check your web browser's Password manager (Google or Edge) to see whether the credentials have been saved there.
If you are able to fetch the username, you can use the following link to reset your password: