Hi I am facing a problem, while using MapPoint Services in my .NET application. I have created a windows application with which I am trying to locate a particular account. I am retrieving the address of this account from MS CRM by passing the GUID and then passing this address to MapPoint Services (FindAddressSpecification) to locate this account. Following is the code: FindServiceSoap FindService = new FindServiceSoap(); FindService.Credentials = new System.Net.NetworkCredential("XYZ", "***"); FindService.PreAuthenticate = true; FindAddressSpecification spec = new FindAddressSpecification(); spec.InputAddress = new Address(); spec.InputAddress.AddressLine = bb.address1_line1; spec.InputAddress.CountryRegion = bb.address1_country; spec.InputAddress.Subdivision = bb.address1_stateorprovince; spec.InputAddress.PrimaryCity = bb.address1_city; spec.InputAddress.PostalCode = bb.address1_postalcode; spec.DataSourceName = "MapPoint.NA"; FindResults results = FindService.FindAddress(spec); <- exception coming here While debugging, I am getting the following exception: â The request failed with HTTP status 407: Proxy Authentication Required (The ISA Server requires authorization to fulfil the request. Access to the Web proxy filter denied.â Kindly help me in this regards. Thanks in advance and help appreciated. Bharat Chawla