This check tests all RFC destinations of type '3' (SAP system) that have been defined in this system. The following system data is retrieved from the partner system and displayed: System ID, client, and logical system name (if connection and data exist). You can see whether the logical system name in the partner system matches the name in your system.
You can go to the transaction Maintain RFC Destinations (transaction code SM59).
You receive a detailed log of the check result.