In this article, we are going to do a demo on Azure AD B2C authentication in the MVC application[.NET 6]. Azure AD B2C Configuration Steps: Step1: Login into Azure Portal( https://portal.azure.com/ ) Step2: Chose the directory that has the subscription(eg: free, student, pay-as-you-go, etc). (1) Select the 'Directories + Subscriptions' on the azure portal menu. (2) Left side menu select 'Directories + Subscriptions'. Bottom select 'All Directories' tab where we can select all directories we have the option to 'switch'. Here I have only one directory that has my subscription. So if we have multiple directories then we can see a 'switch' option. Step 3: The 'Microsoft.AzureActiveDirectory' resource provider needs to register with our 'subscription'. (1) On the Azure portal home page select 'Subscriptions'. (2) Now select your appropriate subscription. (3) Search 'Resource Provider' and then 'Microsoft.AzureAc