[C#] When trying to work with Active Directory, for any action, an error occurs (inside). How to fix?

Question

Active Directory

Error: System.Runtime.InteropServices.COMException (0x8007054B): The specified domain does not exist or cannot be contacted.
From the administrator launched, gave the rights, all the same gives this exception. Windows 8.1

Answer 1

DirectorySearcher specified ?
For example:

var searchRoot = new DirectoryEntry(@"LDAP://DC=subdom,DC=ourdomain,DC=com", @"domain\iis-appPool-username", "password");
searchRoot.AuthenticationType = AuthenticationTypes.ReadonlyServer;

using (var searcher = new DirectorySearcher(searchRoot)) // Specify the search root here
{
  searcher.Filter = string.Format("(&(objectClass=group)(sAMAccountName={0}))", "someGroupName");
  searcher.PropertiesToLoad.Add("distinguishedName");

  var result = searcher.FindOne();
}