Hi,
As bi Java system is configured to call the LPD_CUST so no change in that space.
Try to create a system in system landscape of the portal pointing to BI java system with the below details.
System Name : name that you want to give
System Type :
Web AS Description : Name that you want to give
Web AS Host Name : <hostname of the bi java system >:5XX00
Web AS Path : /webdynpro/dispatcher or try to keep this empty...
Web AS Protocol http/https
Alais Name should be that with withc you would be calling the BI JAVA system via iview.
Thanks
Rishi Abrol