Symantec Installation Manager (SIM) error: Cannot access the product-listing file placed on the Symantec Server.

Products

• Client Management Suite
• IT Management Suite

Issue/Introduction

Unable to launch the Symantec Installation Manager (SIM) and the following errors are in the log files:

Exception while accessing[https://www.solutionsam.com/solutions/pl/symantec_v2.pl.xml.zip]. The remote service point could not be contacted at the transport level.
Unable to connect to the remote server
   [System.Net.WebException @ System]
   at System.Net.HttpWebRequest.GetResponse()
   at Symantec.Installation.FileDownloader.OpenHttpStream(Uri fileUri, Func`2 func, Action`1 initRequest)

No connection could be made because the target machine actively refused it 172.16.xxx.xx:443
   [System.Net.Sockets.SocketException @ System]
   at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)

Exception logged from: 
   at Symantec.Installation.Logging.LogActivity.ReportException(Int32 severity, String strMessage, String category, Exception exception, String footer)
   at Symantec.Installation.Logging.LogActivity.ReportException(String strMessage, String category, Exception exception)
   at Symantec.Installation.FileDownloader.ProcessWebException(String url, WebException webException)
   at Symantec.Installation.FileDownloader.OpenHttpStream(Uri fileUri, Func`2 func, Action`1 initRequest)
   at Symantec.Installation.FileDownloader.GetHttpFileInfo(Uri fileUri, Int64& fileSize, DateTime& fileLastWriteDate, DateTime& fileCreationDate)
   at Symantec.Installation.FileDownloader.<>c__DisplayClass46_0.<GetRemoteFileInfo>b__1(Uri uri)
   at Symantec.Installation.FileDownloader.DownloadFile(Uri source, Func`2 downloader, Int32 maxRetryCount)
   at Symantec.Installation.FileDownloader.GetRemoteFileInfo(Uri fileUri, Int64& fileSize, DateTime& fileLastWriteDate, DateTime& fileCreationDate, Int32 maxRetryCount)
   at Symantec.Installation.Managers.ProductListingManager.HaveInternetConnectivity()
   at Symantec.Installation.Managers.ProductListingManager.SetSIMConnectivityMode()
   at Symantec.Installation.Managers.ProductListingManager.LoadAndUpdateProductListings()
   at System.Threading.Tasks.Task.Execute()
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)
   at System.Threading.Tasks.Task.ExecuteEntry(Boolean bPreventDoubleExecution)
   at System.Threading.ThreadPoolWorkQueue.Dispatch()

Unable to query file info of https://www.solutionsam.com/solutions/pl/symantec_v2.pl.xml.zip. Computer may not be connected to the internet. Error: Failure

The following errors are show on the screen:

Environment

ITMS 8.6

Resolution

The following steps resolved this issue:

1. Disabled the proxy settings in the browser
2. Configured the appropriate proxy information in the SIM using credentials that include the domain name (domain/user)