Forum Discussion
Office365 login with ADFS and public Email addresses
Hi, We have a scenario where a client wants to use private email addresses for login-credentials in Office 365. We believe that we need to use ADFS for authentication, but not sure where to start t...
Private meaning if the users could authenticate using John.doe@hotmail.com and a password into our ADFS, which authenticates and logs the user into Office365, where the actual username may be John.doe@tenant.onmicrosoft.com
I'd say technically this would probably be doable. You'd look at configuring this user to have the UPN "john.doe@hotmail.com" and would have to modify the claims issuance rules to send a different value. Additionally, the user would have to have a password in your Active Directory against that object. Not pleasant.
Technically doable? Probably. Clever? Probably not. This will introduce A LOT of complexity, pain, and lack-of-support, for minimal gain.
I'd very strongly suggest reevaluating your requirements here.
EDIT: To clarify, you could configure AD FS to do strictly what you've asked, but as VasilMichev mentions above, using a public account's credentials against AD FS is not possible.