Hello, good day and thanks for your question. If you have multiple accounts, you can also check with your friends or colleagues to whom you might have shared your email address if you have previously played with them. You may also check and see the below.
- If you know your password but just want to change it, go to account.microsoft.com/security and select Change password.
- If you know your username and password but they have stopped working, read My username and password have stopped working.