azure pass through authentication vs adfs
https://winsmarts.com/adfs-vs-passthrough-auth-63f148d6f748
https://social.msdn.microsoft.com/Forums/en-US/fdf3b6cf-66c5-411b-83c0-f7927a845e32/passthrough-authentication-vs-federated-sso-with-ad-fs?forum=WindowsAzureAD
https://docs.microsoft.com/en-us/azure/active-directory/connect/active-directory-aadconnect-pass-through-authentication-faq
quote "
What sign-in options are supported? For PTA, username & password only. For ADFS, you can use usernames & passwords, certificate-based authentication and other methods.
In a nutshell, if you need just sign-in from PTA or ADFS, and don't need any of the flexibility or features provided by ADFS, you can opt for PTA
https://winsmarts.com/adfs-vs-passthrough-auth-63f148d6f748
https://social.msdn.microsoft.com/Forums/en-US/fdf3b6cf-66c5-411b-83c0-f7927a845e32/passthrough-authentication-vs-federated-sso-with-ad-fs?forum=WindowsAzureAD
https://docs.microsoft.com/en-us/azure/active-directory/connect/active-directory-aadconnect-pass-through-authentication-faq
quote "
What sign-in options are supported? For PTA, username & password only. For ADFS, you can use usernames & passwords, certificate-based authentication and other methods.
In a nutshell, if you need just sign-in from PTA or ADFS, and don't need any of the flexibility or features provided by ADFS, you can opt for PTA
