Hello there.

I've managed to get backoffice logins working with Active Directory. However, upon initial login, the side-menu does not load, and I get some 417 Invalid token errors in the console.

If I hit F5 to reload the page, the error goes away, and the side-menu is loaded just fine.

This is the code:

var result = Task.FromResult(BackOfficeUserPasswordCheckerResult.InvalidCredentials);

        try
        {
            var pc = new PrincipalContext(ContextType.Domain, WebConfigurationManager.AppSettings["ldapAddress"]);

            var isValid = pc.ValidateCredentials(user.UserName, password);
            if (isValid)
            {
                result = Task.FromResult(BackOfficeUserPasswordCheckerResult.ValidCredentials);
            }
        }
        catch (Exception ex)
        {
            result = Task.FromResult(BackOfficeUserPasswordCheckerResult.InvalidCredentials);
            LogHelper.Error(typeof(ActiveDirectoryAuthenticator), "Error logging in using ActiveDirectory", ex);
        }

        return result;

Note: Some code left out (does not affect the issue at hand)

And this is where I setup the UmbracoCustomOwinStartup:

 public class UmbracoCustomOwinStartup
{
    public void Configuration(IAppBuilder app)
    {
        var applicationContext = ApplicationContext.Current;
        app.ConfigureUserManagerForUmbracoBackOffice<BackOfficeUserManager, BackOfficeIdentityUser>(
            applicationContext,
            (options, context) =>
            {
                var membershipProvider = MembershipProviderExtensions.GetUsersMembershipProvider().AsUmbracoMembershipProvider();
                var userManager = BackOfficeUserManager.Create(options,
                    applicationContext.Services.UserService,
                    applicationContext.Services.ExternalLoginService,
                    membershipProvider);

                userManager.BackOfficeUserPasswordChecker = new ActiveDirectoryAuthenticator();
                return userManager;
            });

        app.UseUmbracoBackOfficeCookieAuthentication(ApplicationContext.Current)
           .UseUmbracoBackOfficeExternalCookieAuthentication(ApplicationContext.Current);
    }
}

It seems the cookie being set is not correct, as it changes after I press F5.

Anyone have an idea?