Dear All,
We have a situation.
Our ECC QA(QE3) system has been decomissioned or shut down. We had been using it for past one year as the source system for QB3.
Now we have a new ECC QA system(EE3) and Basis have created an RFC connection and have replicated the datasources of EE3 to QB3.
Now there are many objects(infocubes, DSO's) which are having their source system as QE3, after QE3's removal, these transformation are inactive and are still pointing to QE3. Now we want them to refer to the same datasources, of EE3.
Ex: Transformation between 0FI_GL_4 to DSO is inactive at QB3 and it is looking for source system QE3, Now i need to activate the transformation and make it refer to EE3.
A temp. fix was figured out, In QB3 RSLGMP we had maintained source and target system as DE3 to EE3(new system).
Then we collected the transformation between 0FI_GL_4 to DSO from development BW system and imported to the QB3,
Now it works fine. If we need to do the same way for all the existing objects then its going to take lot of time 
Any idea gurus?