The transaction RSCRM_BAPI can be used to create queries for your BW system. The result is stored either in a table or a file. Use AE to make queries either regularly or upon request.
In the first step, log on to the BW system and call the transaction RSCRM_BAPI. Schedule the query to be automated with AE once. Each query has its own batch ID. Open the batch monitor and copy this number.
Now create a SAP job in your AE system. Use the Form tab or write the following function directly into the Process tab:
R3_ACTIVATE_REPORT REP='RSCRMREPORT_BAPI'
Now change to the SAP tab and enter the copied BatchID in the field Job name.
This Job object can now be integrated in your processing (e.g. in a Schedule object) and will process the query at the point in time you define.
It is a SAP peculiarity that the batch monitor does not display all query executions but only the last one.