Azure integration and subscription

I am a subscriber of Auth0, I have an application where we offer a service to other companies/users, using Auth0 for social login and passwordless authentication.

We want to provide a service to an important client who needs to connect from an Azure domain (they use Microsoft Teams account). We have tried connecting through “Social” option, but it’s not working, indicates that Microsoft account does not exist.

I have verified that B2B plan includes “3 Enterprise connections”.

Would switching plans solve the problem? In that case, which connection do u think will solve our problem?

Thank u very much!