OpenID by email with restriction by domain, no User Database

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Hi @vladkh

Thank you for reaching out to us!

I’ve read your use case and there are a couple of directions you can take. Please let me know where would your users be stored, will they be stored externally on the IdP side and Auth0 will only serve for login?
If this is the case, I believe that our Home Realm Discovery feature would work best, as you can request the users to only provide their email address and then redirect them to the appropriate IdP for authentication. This fits well with Organizations to further ensure company identity and branding, as need may be.

I believe the desired flow can be achieved with the above features, but allow me to provide some additional documentations that could also prove useful:

Hope this helped!
Gerald