I am trying to call Graph API from my SPFx webpart (in SharePoint 2019 on-premise) using ADAL.js. It works fine but user needs to sign-in to Azure AD once. Our on-premise AD is already synched with Azure AD.
We don't want users to see the 'Sign-In' button (to call the graph api). Users should be authenticated automatically as they are already connected with on-premise AD.
Does adal.js/msal.js supports Implicit flow only or integrated windows authentication is possible?