title: AD LDS ValidateCredentials gives false after enabling Password Policy
body: <p>I am using AD LDS to authenticate user. There is one issue I am facing with.</p>
  
  <p>I have the following code to authenticate a user:</p>
  
  <pre><code>PrincipalContext context = new PrincipalContext(ContextType.ApplicationDirectory,xxxx, xxxx, ContextOptions.SimpleBind);
  auth = context.ValidateCredentials(userId, CryptoHelper.Decrypt(password), ContextOptions.SimpleBind);
  </code></pre>
  
  <p>When the password policy from Local Security Policy is disabled the auth returns true, however when I enable it, it returns false.</p>
  
  <p>Also, the auth returns false only for users which are created after enabling the password policy.</p>