CRMConnector cCRM = new CRMConnector();
IOrganizationService service = cCRM.obtenerServicio();

RetrieveAuditPartitionListResponse partitionRequest = (RetrieveAuditPartitionListResponse)service.Execute(new RetrieveAuditPartitionListRequest());
AuditPartitionDetailCollection partitions = partitionRequest.AuditPartitionDetailCollection;

string uri = "";
string user = "";
string password = "";
string pathXML = AppDomain.CurrentDomain.BaseDirectory + @"CRMConfig.xml";
XmlTextReader reader = new XmlTextReader(pathXML);
XmlDataDocument xmldoc = new XmlDataDocument();
XmlNodeList xmlnode;
xmldoc.Load(pathXML);

xmlnode = xmldoc.GetElementsByTagName("connection");
uri = xmlnode[0].ChildNodes.Item(0).InnerText.Trim();
user = xmlnode[0].ChildNodes.Item(1).InnerText.Trim();
password = xmlnode[0].ChildNodes.Item(2).InnerText.Trim();

IOrganizationService s = null;
try
{
    ClientCredentials cre = new ClientCredentials();
    cre.UserName.UserName = user;
    cre.UserName.Password = password;

    Uri serviceUri = new Uri(uri);
    OrganizationServiceProxy proxy = new OrganizationServiceProxy(serviceUri, null, cre, null);
    proxy.EnableProxyTypes();
    s = (IOrganizationService)proxy;
    return s;
}
catch (Exception ex)
{
    //log("Error al momento de inicializar el servicio: " + ex.ToString());
}
return s;