Hey,

I was hoping someone might be able to provide a bit of help getting Azure B2C working to authenticate external users into the backoffice.

I have implemented the suggested code here, however after redirecting out to B2C it just seems to return to /umbraco-signin-oidc and display a ERR_CONNECTION_REFUSED error in my browser.

My auth code looks like below

builder.AddBackOfficeExternalLogins(logins =>
        {
            builder.Services.ConfigureOptions<AzureAdAuthenticationBackOfficeExternalLoginProviderOptions>();

            logins.AddBackOfficeLogin(
                auth =>
                {
                    auth
                        .AddOpenIdConnect(
                        auth.SchemeForBackOffice(OpenIdConnectDefaults.AuthenticationScheme),
                        Constants.AzureAdB2C,
                            options =>
                            {
                                options.RemoteSignOutPath = "/oidc-signout";
                                options.MetadataAddress = "https://xx.b2clogin.com/landoswolerissiandev.onmicrosoft.com/B2C_1_signin1/v2.0/.well-known/openid-configuration";
                                options.ClientId = "xxxx";
                                options.SignedOutRedirectUri = "https://localhost:44323/umbraco";
                                options.TokenValidationParameters = new Microsoft.IdentityModel.Tokens.TokenValidationParameters
                                {
                                    NameClaimType = "name"
                                };
                            });
                });
        });
        return builder;

If anyone has any advice or working examples in the latest versions of v9 that would be amazing!

Thanks