I don't think there's a formal spec for the otpauth URI yet [0], even if there is a spec by Google [1], so this may just come down to MS adding some incompatibi

I don't think there's a formal spec for the otpauth URI yet [0], even if there is a spec by Google [1], so this may just come down to MS adding some incompatibility to force usage of their authenticator, or the app using some proprietary authentication scheme that is not otpauth. There's nothing complicated about otpauth provisioning URIs i.e. what's encoded into the QR code. [0]: https://shkspr.mobi/blog/2022/05/why-is-there-no-formal-specification-for-otpauth-urls/ https://shkspr.mobi/blog/2022/05/why-is-there-no-formal-spec... [1]: https://github.com/google/google-authenticator/wiki/Key-Uri-Format https://github.com/google/google-authenticator/wiki/Key-Uri-...