WCF Web服务的UNC文件共享身份验证

我们有一个WCF服务，它将分别向FileShare上传文档和从FileShare下载文档。

客户端应用程序将在请求中传递FileShareLocation和FileName。但我们遇到了一些例外，无法得到回应。

FileSharePath示例：''SERVERIP'SHAREDFOLDER

注意：当我不使用网络文件共享时，该服务工作正常。

'. ---> System.Net.WebException: The remote server returned an error: (500) Internal Server Error.
   at System.Net.HttpWebRequest.GetResponse()
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   --- End of inner exception stack trace ---

Server stack trace: 
   at System.ServiceModel.Channels.HttpChannelUtilities.ValidateRequestReplyResponse(HttpWebRequest request, HttpWebResponse response, HttpChannelFactory factory, WebException responseException, ChannelBinding channelBinding)
   at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelRequest.WaitForReply(TimeSpan timeout)
   at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at wcfServiceTest.wcfService.ICommonService.UploadDocument(UploadDocumentRequest request)
   at wcfServiceTest.wcfService.CommonServiceClient.wcfServiceTest.wcfService.ICommonService.UploadDocument(UploadDocumentRequest request) in D:'Test'CMS'wcfServiceTest'wcfServiceTest'Service References'wcfService'Reference.cs:line 2309
   at wcfServiceTest.wcfService.CommonServiceClient.UploadDocument(RequestHeader UploadDocumentReqHdr, Byte[]& UploadDocumentContent) in D:'Test'CMS'wcfServiceTest'wcfServiceTest'Service References'wcfService'Reference.cs:line 2316
   at wcfServiceTest.frmMain.DocumentUpload_Click(Object sender, EventArgs e) in D:'Test'CMS'wcfServiceTest'wcfServiceTest'frmMain.cs:line 105