We have a sample for this use case here: https://github.com/azure-ad-b2c/samples/tree/master/policies/invite
Let us know what you think and if this fits your use case.
An error occurred while saving the commentfoobar commented
This is such a strikingly obvious use case, that's how it's done everywhere else. This is what users expect. I'm astonished it's not available in AD B2C. This flaw undermines my trust in the maturity of the product as I'm evaluating available options.
We have a private preview of this feature available. If you are interested in joining, please contact firstname.lastname@example.org with the name of your tenant.
Hi all, unfortunately we don’t have plans to share out a public roadmap. This is constantly changing as we’re listening to customer requests. We will continue to update feedback.azure items as they come up so feel free to suggest anything you are curious about.
We are working on a way to allow you to call the Graph API to change the email address and MFA. We should have an update by Dec 2018.