We are thinking installing Application Express with our OBIEE application.
We already have OHS which comes with OBIEE and 11g Database.
Can we install APEX on OHS server? Or dose it need to host on the 11g Database server?
Check this out
My interpretation is that you do not need a separate license if the OHS is installed on the same server as the database, but if it is installed on a separate server, then it needs to be licensed. As you are licensed for OHS through OBIEE, then you should be OK. As I said, that is my interpretation, but if you are unsure, you should check with Oracle.