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External Idp using Cookie Middleware in IdentityServer3

Aug 3 at 8:57 AM
Hi All,
I'm using an internal Identity Store. In order to use it as an External Idp, I'm using the Cookie Middleware and when I run the website the following error is showed in the logger: no providers registered for client Following the Code in Startup.cs
using AuthorizationCFlow.Service;
using IdentityServer3.Core.Configuration;
using IdentityServer3.Core.Models;
using IdentityServer3.Core.Services;
using Microsoft.Owin.Security.Cookies;
using Owin;
using Serilog;
//using Serilog;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Web;

namespace AuthorizationCFlow
    public class Startup
        public void Configuration(IAppBuilder app)

            var factory = new IdentityServerServiceFactory();

            app.Map("/identity", idsrvApp =>
                idsrvApp.UseIdentityServer(new IdentityServerOptions
                    IssuerUri = Shared.Constants.AuthorityIdentityServer,
                    SiteName = "Embedded IdentityServer",
                    SigningCertificate = LoadCertificate(),

                    Factory = factory,
                    AuthenticationOptions = new AuthenticationOptions
                        EnableLocalLogin = false,
                        IdentityProviders = ConfigureIdentityProviders


        public static void ConfigureIdentityProviders(IAppBuilder app, string signInAsType)
            var cookie = new CookieAuthenticationOptions
                AuthenticationType = signInAsType,
                //Entry Point for my custom Idp 
                LoginPath = new Microsoft.Owin.PathString("/Account/Login"),
                AuthenticationMode = AuthenticationMode.Passive,
                CookieName = "CookiesIdp",
        X509Certificate2 LoadCertificate()
            return new X509Certificate2(
            string.Format(@"{0}\Certificate\idsrv3test.pfx", AppDomain.CurrentDomain.BaseDirectory), "idsrv3test");
Anyone has some suggestion for it ? Thank you