Change Password of Active Directory user using C#

i am trying to ChangePassword of an active directory user using c# code

i picked up the code from msdn

however, i am getting an error when i run the code [see screenshot]

can someone please help me?


DirectoryEntry de = new DirectoryEntry("LDAP://arka.com", @"arka.com\prashanttesting", "curpwd", AuthenticationTypes.Secure);
        de.Invoke("ChangePassword", new object[] { "curpwd", "newpwd" });
        de.Close();

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LVL 2
RakeshBhandariAsked:
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Russell_VenableConnect With a Mentor Commented:
Your problem is IADsUser is not being reached. Something is wrong with A.) Input B.) Your settings are not configured properly.

Do you have a password policy in place? Do you have SSL enabled under your configuration? If SSL is enabled does the username match the SSL Certificate name? Active Directory enforces a restriction that any modification to the unicodePwd attribute must be made over an encrypted channel with a cipher strength of 128 bits.  So if SSL is not configured your password change will be rejected every time as a security precaution so joe-smo cannot see your clear-text password and then login using that account credentials.

Also this a better example of the above as you can see which of the fields they below too. It properly closes the connection and garbage collects on exit.
string ADPath = "LDAP://arka.com";
string ADUser = @"arka.com\prashanttesting";
string strOldPassword = "curpwd";
string strNewPassword = "newpwd";

using(DirectoryEntry oDE = new DirectoryEntry(ADPath, ADUser, ADPassword, AuthenticationTypes.Secure))
{
    try
    {
       // Change the password by exposing IADsUser ADSI interface
       oDE.Invoke("ChangePassword", new object[]{strOldPassword, strNewPassword});
    }  
    catch (Exception ex)
    {
       Debug.WriteLine("Error changing password. Reason: " + ex.Message);
    }
}

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Reference:
LDAP Ports
Configuring Microsoft Active Directory for SSL Access
How to enable LDAP over SSL with a third-party certification authority
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John ClaesSenior .Net Consultant & Technical AnalistCommented:
RakeshBhandari :

The domain where you're testing upon is "arka.com"?
and the folowing user exists? "prashanttesting"
with the password? "Nbspl@123"

when copying code from any source you must first understand the code before starting a Build.
In this example you must check the domain/User and Password.

regards

poor beggar
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RakeshBhandariAuthor Commented:
@poor_beggar
OFCOURSE i understand that code that i have taken from the other source and all the info (user, pwd, domain) is correct


@dhansmani
i do NOT want to setpassword as that will require me to have an a/c with admin privileges
i want to do it using ChangePassword method...but somehow its not working
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Dhanasekaran SengodanCommented:
refer this article in MSDN, its mightbe useful

http://msdn.microsoft.com/en-us/library/ms817839
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RakeshBhandariAuthor Commented:
thank you!
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