Forgotten email used for Xbox account

You can attempt to recover your account using this form Help with the Microsoft account recovery form - Microsoft Support

Hello! If you have forgotten the email to an account, please reach out to Xbox Phone Support (support.xbox.com/contact-us) and inform them that you have forgotten the email to said account.
Thanks!

Thank you so much! I had forgotten I used a different email for my xbox 360 account.

Not sure how that can happen as a email account can only have 1 Xbox account tied to it, you can't create another account with an already used email account, you must have forgotten your details

Hi
My name is Rishabh an Independent Adviser, I hope you are doing great out there. I’m happy to help you with your question.

If you've forgotten your sign-in information on Xbox, whether it's your password or email, you can still recover your account using the account recovery process. Here's how to do it:

If you've forgotten the email address associated with your Xbox account, try the following:
Check any alternate email addresses you might have used for account sign-up.
Look through your records for any confirmation emails or receipts related to your Xbox account.
If you have your Xbox console, check the account settings to see if your email address is listed there.

Recover Forgotten Password:

After recovering email, recover your password, follow these steps to reset it:
On the sign-in page, select "Forgot your password?"
Enter the email address associated with your Xbox account.
Complete the security challenge to verify your identity.
Follow the prompts to reset your password. You'll receive a verification code via email or phone to confirm your identity.
Recover Forgotten Email Address:

I hope this helps! Let me know if you have any other questions.

Thanks and