These fields aren't available through the Blackbaud API, but we have numerous queries and reports that rely on them, dating back to when we first started using RE. We use the Mailing ID field to track the platform through which a gift was made, and the Finder Number field to identify constituents from acquisition mailing finder files. If we can't map to these fields in Omatic Cloud, it will require significant changes to our existing workflows. Currently, I'm adding this data to gift records with a Blackbaud import after importing through IOM+, which is not an efficient process.