To do authentication against Microsoft Windows Azure AD, using the Microsoft ADAL library underneath. Note this library is extracted from the adal-angular package.
This also provide AuthHttp class, which actually gets token in background for external webapis.
NPM Package: https://www.npmjs.com/package/ng2-adal
Example and guideline: https://github.com/ranveeraggarwal/ng2-adal-QuickStart