Microsoft Active Directory Exchange ADFS SSO
We need to simulate an SSO using on-premises Active Directory to allow web/mobile users to log in to their
domain using ADFS token flow, and use that token to get access to their MS Exchange calendars, our
understanding that we need to have ADFS token flow and authenticate (mobile / web ) as a native app, then
allow EWS to authenticate using ADFS token, but we are open to other solutions, e.g., Identity Server,
Unfortunately, we can't go 0Auth or Azure Active Directory
https://learn.microsoft.com/en-us/windows-server/identity/ad-fs/development/msal/adfs-msal-native-app-web-api
https://learn.microsoft.com/en-us/exchange/clients/outlook-on-the-web/ad-fs-claims-based-auth?view=exchserver-2019