How to Enhance IC Inbox based on Partner Functions

Hi Everyone,

I have a requirement to enhance the IC Inbox search criteria and include Partner functions in the Search attributes.

I need to include a new field ICAGENT. ICAGENT is a standard partner function we are using in Interaction Record.

So lets say, when the user enters an ID: 1000000010 in ICAGENT field and clicks on Search. Inbox Search should fetch all the Interaction records having the partner function ICAGENT = 1000000010

In the Inbox search query object : BTQueryAUI , there is a field called ACCOUNT but no fields for partner function based search. How to achieve this functionality. Any pointers will be really helpful.

I am aware of enhancing the BTQueryAUI search structure with the attribute. But not sure how do we enhance the search query. Or is there any we can implement through INBOX BADI.

Thank you,

San