Managing personal Outlook.com account settings, security, and privacy
The @outlook.com address shown in the message is only an email address and does not necessarily mean that Microsoft manages this verification process.
The error suggests that the identification documents may already be associated with another account on the platform you are trying to verify. Only that platform’s verification team can review or remove the existing association. Please contact the company directly through the official Help or Support page on its website or app, rather than sending identification documents to the displayed address until you have confirmed that it is legitimate.
Could you clarify which website or app you were using when this message appeared?
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