How to integrate Azure AD SSO in flutter app
Currently, there is no native SDK for Flutter to integrate with AAD.
Here is a Flutter OAuth package for performing user authentication against Azure Active Directory OAuth2 V2.0 endpoint.
Regarding Single sign-on, you can refer to this document.
I'm not sure, if you are still looking. May be this will be useful for others. Build Azure B2C service authentication https://github.com/MaikuB/flutter_appauth Full application code can be found here https://nicksnettravels.builttoroam.com/connecting-flutter-to-azure-ms-ignite/