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If privacy or separation of work and personal accounts is the reason for not wanting to use a personal phone for MFA, the registration process that uses the QR code does not sign in your phone to Seattle University or provide any access or monitoring to the phone. Using the Microsoft Authenticator app will note the model of phone and version number of the Microsoft Authenticator being used in your account, to better manage the authentication methods. If using a non-Microsoft authentication app, only a unique identifier is recorded.
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