Microsoft Security | Microsoft Authenticator
A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation
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Error code 500121 occurs when adding a work Exchange account in the Authenticator app on a new device, due to the unavailability of the old device for authentication codes.
In addition, work organization admins do not have this ability or is out of their scope.
A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation