Managing personal Outlook.com account settings, security, and privacy
Hello,
If you have two-step verification enabled, you will not be able to use the Account Recovery form to regain access to your account. In this case, account recovery may be difficult, and you may even permanently lose access to the account.
In this situation, please refer to the Microsoft article below. You’ll need to run the provided tool and follow the on-screen prompts. You will have a chance to talk with Microsoft support if the Automated tool couldn't help.
How to recover a hacked or compromised Microsoft account
Alternatively, you can submit the Account Recovery form through Xbox. The team will review your account and may be able to help reinstate your account, if possible.
https://support.xbox.com/en-US/forms/recover-your-microsoft-account