AADSTS50011: The reply url specified in the request does not match the reply urls configured for the application: ''

Question

I have a .NET Core 2 app template that is configured to use Azure AD out of the box.

The configuration is:

{
  \"AzureAd\": {
    \"Instance\": \"https:         


        

Answer 1

Make sure services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1); must below the Authentication configuration.

services.AddAuthentication(options =>
{
    options.DefaultChallengeScheme = OpenIdConnectDefaults.AuthenticationScheme;
    options.DefaultSignInScheme = CookieAuthenticationDefaults.AuthenticationScheme;
    options.DefaultAuthenticateScheme = CookieAuthenticationDefaults.AuthenticationScheme;
})
.AddOpenIdConnect(options =>
{
    options.Authority = "";
    options.ClientId = "";
    options.ResponseType = OpenIdConnectResponseType.IdToken;
    options.CallbackPath = "";
    options.SignedOutRedirectUri = "";
    options.TokenValidationParameters.NameClaimType = "name";
})
.AddCookie();

I was facing the same error due to having added AddMvc() before the AddAuthentication() extension method.