I am in the process of setting up the integration of EBS R12 to ERPi to FDM to HFM. Currently, I am planning on having ERPi concatenate 2 R12 segments via a metadata rule, Account & Subaccount to arrive at one account in HFM for all accounts that have a subaccount in R12. My question is, will the drill through still work if this is setup in ERPi versus a FDM import script to perform the concatenation? Is this the same for all other dimensions that I plan to add prefixes (Ex. Entity, Scenario)?
Also, does drill through still require all R12 segments to be mapped into HFM? I have some empty segments that may not be necessary to be imported during this phase.