A few days ago Microsoft Identity Division announced the #azuread B2C GA in North America.
If you want to get the idea behind the B2C service, you can take a look at another blog post that I’ve created in October 2015 and can be found here: https://spanougakis.wordpress.com/2015/10/03/azure-active-directory-is-now-bigger-and-better-with-two-new-services-b2c-and-b2b/
So if you want to know more, I strongly suggest that you go through this excellent article by Swaroop Krishnamurthy, Senior Program Manager in the Azure Active Directory team: https://azure.microsoft.com/en-us/blog/azuread-b2c-ga-announcement/
We hope that we’ll have the chance to use it in Europe soon.
Thanks for your time!