Hi

Below should clarify your question ...

Why SLDAPICUST ?

Connecting to the System Landscape Directory

You only require a connection to the System Landscape Directory (SLD) when you use the ABAP proxy generation or runtime.

Business systems with an Integration Engine require a connection to the SLD server to obtain their name from the SLD. The business system name is used in the header of the message sent to the Integration Server. The connection to the SLD is established by creating an RFC destination (as described below) and calling a registered server program (which is defined on the J2EE RFC engine of the Integration Server). The server program is called with the HTTP address as a parameter that is maintained with transaction SLDAPICUST.

You have to use transaction SLDAPICUST in the business system to define the SLD access data. This data consists of the host and port of the SLD as well as a user and password (PIAPPLUSER, for example). You can use the entries that you maintained on your Integration Server.

Regards

Raj