Load balancing for Isolated Host in Active/Activemode

Client is having 2 Biz Talk Application servers(BTS1,BTS2) in same Biz Talk group(Active/Activemode).Currently 4 biz Talk applications running on both servers.all 4 applications are configured with file adapter in recv and send side.

Now , we are going to deply another 2(A &B) applications.


Application A:

In this BizTalk schema is going to expose as a web service.Source system consume this webservice.

This web service is going to deploy in BTS1

We will share to client the following URL.

http://serverxxx/Inventory/InventoryService.asmx.

Application B:

BizTalk receiving the file from source system via file adapter.BizTalk is going to transform input file as a required target format

now BizTalk is going to consume web service and submitting data.


Now Question is if I deploy Application A in on both servers and both servers are active.Which server will take request of web service service.which web service URL path to share to customer? how to handle this scenario.NLB is must?


For APllication B,the isolated host is in send side ,I don'tthink it's going issue.plz confrim