Combining Requisitions from Different Business Units into a Single Negotiaion

Summary:

I have a business requirement to consolidate requisition lines from different Business Units (BUs) into a single negotiation in Oracle Sourcing. For example:

Line item A from BU - AB

Line item A from BU - AC

We would like to combine both lines into a single negotiation (RFQ) under one BU (e.g., BU AB) to streamline the sourcing process.

However, when using the Document Builder in the Process Requisitions page, we are unable to find or select an existing negotiation from a different BU using the "Add to Existing Negotiation" option. It appears that cross-BU negotiations are not supported in this context.