Link an existing Azure AD B2C Tenant to my Azure subscription.

1. Search for Azure Active Directory B2C at the top searchbar at https://portal.azure.com/
2. Pick: "Link an existing Azure AD B2C Tenant to my Azure subscription"
3. A little form will appear that allows you to associate the tenant with a resource.
4. You may then just go to your resource to have a link into the tenant.

 
 

When this is done you may click on the "Click the Azure AD B2C Settings" tile to drill into the tenant and once inside click on "Applications" at the left to make an application for the tenant. Clicking on "User flows (policies) will similarly allow you to create a sign up/sign in policy, profile editing policy, and password reset policy. If you drill into an application you made there will be a "Keys" link at the upper left that you may use to make a secret key for the application.