Hi Upendra,
There are two ways here.
1. Setting preferences from BI Launchpad to Desktop.
2. Using already installed WebI Rich Client in 3-tier (J2EE) mode.
We are referencing here Setting preferences from BI Launchpad to Desktop.
In both the scenarios only connection server will come in to picture.
Explanation: This is because it skips the necessity of having middle-ware to connect the reporting database on client tools. In both the cases we do not require middle-ware on client PC and without using WebI processing serves on BO and utilizing client PC's memory and process.
Thanks,
-Satish