Data Migration via DMF - Using Auto-Number vs. External IDs:
"You're importing a large set of purchase orders from a legacy system into D365 F&O using the Data Management Framework (DMF) data entities. The legacy system had its own PO numbering scheme. How would you decide whether to use the legacy PO numbers versus letting D365 F&O assign new PO numbers? What DMF features or configurations help implement both approaches?"
Interviewer guidance: The candidate should discuss two approaches: (a) using F&O's number sequences via DMF's Auto-generated field mapping to assign new POs unique to F&O (maintaining referential integrity within F&O), or (b) preserving legacy PO numbers by marking F&O's PO number sequence as manual so imports accept provided IDs. Expect mention of DMF's ability to auto-generate number sequence values during import, and considerations like verifying that no duplicates occur if legacy numbers overlap with existing data.