Hi, I've got a difficult situation...
Is a website that runs on IIS with Anonymous Authentication, the tag
<identity impersonate="false"> on the Web.config file. So the thread is
executed by user "NT AUTHORITY".
So when I use AD API ( FindOne() ) it works well.
The point is that when I impersonate that user by code (that works well too)
when I execute that function from the AD API it returns an error:

{"Operation Error" } [System.Runtime.InteropServices.COMException]:
{System.Runtime.InteropServices.COMException} System.Object:
{System.Runtime.InteropServices.COMException} _className: null
_COMPlusExceptionCode: -532459699 _exceptionMethod:
{System.Reflection.RuntimeMethodInfo} _exceptionMethodString: null _helpURL:
null _HResult: -2147016672 _innerException: { } _message: "Operation Error"
_remoteStackIndex: 0 _remoteStackTraceString: null _source:
"System.DirectoryServices" _stackTrace: {System.Array} _stackTraceString: "
at System.DirectoryServices.DirectoryEntry.Bind(Boole an throwIfFail)\r\n at
System.DirectoryServices.DirectoryEntry.Bind()\r\n at
System.DirectoryServices.DirectoryEntry.get_AdsObj ect()\r\n at
System.DirectoryServices.DirectorySearcher.FindAll (Boolean
findMoreThanOne)\r\n at
System.DirectoryServices.DirectorySearcher.FindOne ()\r\n at
Banelco.CSB.DNN.Providers.ActiveDirectory.LdapAuth entication.GetUser(String
username)" _xcode: -532459699 _xptrs: 0 HelpLink: null HResult: -2147016672
InnerException: { } Message: "Error de operación" Source:
"System.DirectoryServices" StackTrace: " at
System.DirectoryServices.DirectoryEntry.Bind(Boole an throwIfFail)\r\n at
System.DirectoryServices.DirectoryEntry.Bind()\r\n at
System.DirectoryServices.DirectoryEntry.get_AdsObj ect()\r\n at
System.DirectoryServices.DirectorySearcher.FindAll (Boolean
findMoreThanOne)\r\n at
System.DirectoryServices.DirectorySearcher.FindOne ()\r\n at
Banelco.CSB.DNN.Providers.ActiveDirectory.LdapAuth entication.GetUser(String
username)" TargetSite: {System.Reflection.RuntimeMethodInfo


Thanks

Alberto Ortega