Once Conditional Access is configured for the SCA for iOS, it can happens in rare cases that the login is temporarily not possible due to Microsoft Authenticator cache holds authentication-token.
This error is handled by the app and SCA displays the error-ID from Azure AAD with a short description of the error.
Users need to close the SCA-App and have to wait for 2 hours, the authentication cache to expire.
In Case a user receives this error message:
The following steps need to be done, in order to be able to login:
1) Tap on OK to close the app.
2) Wait for 2h (Caller-Identification does still work)