MBO for the BAPI that has one required parameter

Hi,

I have a question.

Let's say I have a BAPI that requires one input parameter, for Instance, "Geschäftspartner"(business partner) number.

With the bussiness partner number we get an address data and other info that related to partner.

The thing is, how SUP Server caches the data with the "on demand" cache policy, if a BAPI has one required parameter?

I cannot provide this parameter by the time of creating of MBO, because  I don't know it.

I cannot use "Online" caching policy, because we are creating a native Windows App.

What's the best way to make this?

Thanks in advance!