Does Webi report on a UNX universe uses BWA?

We have a BW 7.01 with BWA and also have BO 4.0 SP2.We are trying to create new UNX universe on top of a Multiprovider and create a WEBI report using the universe. All the cubes used in the Multiproivder are indexed in BWA.

When the user executes the WEBI report will it uses the BWA indexes or reads the data directly from database.

Thanks,

Satish