A client of ours asked us a while back to implement Azure B2C authentication for their Episerver implementation. The client is running 15+ websites, each on their own TLD for global presence. They are running their website all over the world, from The Netherlands, Germany, Brazil to China. Note, the websites are not running on a separate subdomain, which is implemented out-of-the-box (and allowed) using Azure B2C. In this blog I will describe the hurdles we had to take to get Azure B2C working on multiple TLD websites.