{

// Set the name of the server to the name of the Microsoft CRM API Web server.

string server = "CRMWebServer";

// Virtual Directory on the Microsoft CRM API Web server.

string virtualDirectory = "mscrmservices";
string strDir = "http:/" + server + "" + virtualDirectory + "";

// Instantiate a Microsoft CRM BizUser object (Member of Microsoft.CRM.Proxy.dll).

Microsoft.CRM.Proxy.BizUser bizUser = new Microsoft.CRM.Proxy.BizUser ();

bizUser.Url = strDir + "BizUser.srf";

// Instantiate a System.Net.CredentialCache object.

System.Net.CredentialCache credentialCache = new CredentialCache();               

// Instantiate a System.Net.NetworkCredential object passing in the Active Directory UserName,
// Password and Domain that will be used to authenticate into the Microsoft CRM Security Model. 
// Set up this user in Microsoft CRM and give the user the appropriate License Keys and Roles. 

System.Net.NetworkCredential credentials = new System.Net.NetworkCredential +
("User1","Password","Domain");

// Add a value to the CredentialCache to indicate the URI of the Microsoft CRM Server, "NTLM", 
// which represents integrated Windows authenticated and the credentials of 
// the user who is to be used for authentication.

credentialCache.Add(new Uri("http:/" + server), "NTLM", credentials);

bizUser.Credentials = credentialCache;

}