This is what I find:
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This allows us to work with you in a secured environment. Click the error you need help with and fill out the requested details on the following page. Please note you’ll need to be signed in with a Microsoft account to access the form. If you are unable to access your primary account, you can use an alternate account (if you have one) or create a new one at https://signup.live.com.
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I was referring to Microsoft phone verification code and in case the phone number is wrong, it is possible to change it from menu but they are some restrictions.