I lost the email address of my microsoft account

you can try this.

Important If you’ve forgotten both your Microsoft account email address
and your password, first retrieve your email address using the
Lost Account Solution, then reset your password.

lost account

To access your Xbox Live account, you must know both the email address and password that you use to sign in to your Microsoft account. If you have lost or forgotten your password, you will need to reset it in order to create a new password.

Important If you’ve forgotten both your Microsoft account email address
and your password, first retrieve your email address using the
Lost Account Solution, then
reset your password.

You can try the troubleshooting steps provided below to recover the email for your account. I hope this works out for you.

https://support.xbox.com/en-MR/account-management/forgot-microsoft-account-solution

When you
create a Microsoft account, you can choose to sign in with any email account you currently use. We recommend using an email account that you monitor frequently. You’ll need access to this email address to sign in to your Xbox console. Simply type the email
address in the field and we’ll walk you through the rest. When creating a Microsoft account, you can use:

• An email address with a Microsoft domain such as @live.com, @outlook.com, or @msn.com
  
• Any valid email address that you use and monitor regularly

Note If you use a non-Microsoft email address to create your account, we will send a validation email to that address to verify that you have access. Simply find the email and follow the
instructions to complete validation.

If you don’t currently have an email address you can use, or if you’re setting up an account for a child who does not yet have an email account, you can opt to create a new Outlook.com email address during
signup.

• To sign up for a Microsoft account, see
  Create an account.
• If you need to change your Microsoft account email address, see
  How to change the email address associated with your Microsoft account.
• If you need help finding your Microsoft account email address or password, use the
  
  Lost Account Solution or the
  Lost Password Solution.

Follow the steps on this page to change the Microsoft account email address or the phone number you use to sign in: https://support.xbox.com/en-US/my-a...nt/change-email-sign-in-for-microsoft-account

Important Before you begin, you need to know the email address and password that you used to set up your Microsoft account. If you don't know them, use the
Lost Account Solution or the
Lost Password Solution.