Using User Principal Name instead of email address for MS ADFS federation SSO
We have two AD groups, Staff and Students, one, Staff has on-prem email and the Active Directory emailaddress field is populated; the other, Students, has O365 email addresses and consequently they emailaddress field in AD is not populated. Therefore, to add Students to the Adobe Admin Console as users and use MS ADFS, we want to change the settings for authenticaiton from "emailaddress => emailaddress" to "User Principal Name => emailaddress" . Both AD groups have values that match the email format and will work but we are not getting any help from Chat not Expert sessions: they state why it is not working with Students not how to reconfigure it to use UPNs.
Does anyone have any experience with this?