Error: "Remote System refused the network connection" when running scheduled script

Problem/Symptoms

When running a scheduled script to a client, the following error occurs:

Remote System refused the network connection

and is recorded in the log file:

Error code -2147023671: Remote System refused the network connection

Cause

1. The certificate file on the client machine has either become corrupted or been deleted.
   
   The file is found in C:\Program Files\LANDesk\Shared Files\cbaroot\certs
   
   The Core Server does an initial check of the certificate file to make sure that it is a client with which it can communicate. Since the hash value is correct it will start the script; however, during the full verification of the certificate, the process will fail and the connection will be refused.
   
   
2. The certificates in the C:\Program Files\LANDesk\Shared Files\keys and/or C:\Program Files (x86)\LANDesk\Shared Files\keys need to be valid and not expired as well. You can double-click the .CRT and open the .0 file in notepad to verify the information. See solution for screenshots.

Solution

Copy the certificate file from the following directory on the Core Server: C:\Program Files\LANDesk\Shared Files\keys to the client's one: C:\Program Files\LANDesk\Shared Files\cbaroot\certs

The certificate file has a .0 extension.

If there are expired certificates on the core server in the C:\Program Files\LANDesk\Shared Files\keys and/or C:\Program Files (x86)\LANDesk\Shared Files\keys folder, back them up and remove the expired certificates from that folder, including any keys and .0 files associated with that cert.