Modifying a Back-End Adapter 
Log on to the NetWeaver AS and start transaction SDOE_WB.
In the Data Orchestration Engine Workbench, navigate to the data object containing the back-end adapter you want to modify and expand it.
Note
If the Backend Adapternode does not appear, it means no back-end adapter was created for the data object.
More information: Creating a Back-End Adapter
Expand Backend Adapter.
The names of the back-end adapters created for that data object appear.
Click the back-end adapter you want to change with the secondary mouse button and choose Change.
The back-end adapter details appear.
Make the appropriate changes and save your work.