manager.UserLockoutEnabledByDefault = true;
        manager.DefaultAccountLockoutTimeSpan = TimeSpan.FromMinutes(5);
        manager.MaxFailedAccessAttemptsBeforeLockout = 5;

[HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult ChangeDefaultUserLockingSetting(int PasswordAttempts, int DefaultLockingTime)
        {

            UserManager.DefaultAccountLockoutTimeSpan = TimeSpan.FromMinutes(DefaultLockingTime);
            UserManager.MaxFailedAccessAttemptsBeforeLockout = PasswordAttempts;

            return View("Index", loadAdministrationViewModel());
        }

@using (Html.BeginForm("ChangeDefaultUserLockingSetting", "Administration", FormMethod.Post, new { }))
    {
        @Html.AntiForgeryToken()
        @Html.TextBoxFor(m => m.PasswordAttempts)
        @Html.TextBoxFor(model => model.DefaultLockingTime)

        <input type="submit" value="Submit strongly type synchronous form" />
    }