Our whole operation depends on an Excel with VLOOKUPs and macros

Excel as integration layer works, until it breaks. Macros nobody understands, formulas that break on a new row, one person who is the only one who knows. A flow replaces it without losing the spreadsheet.

Try this first

1. 1Inventory what the spreadsheet does: import from X, lookups in Y, output to Z. Usually 3 or 4 logical blocks.
2. 2Build the import first: a flow that pushes source data to a central table (DB, Airtable, Notion) nightly or on change. Spreadsheet becomes a read-only report.
3. 3Translate formulas to flow steps: VLOOKUP becomes a join, IF becomes a condition, SUMIFS becomes an aggregation. One at a time.
4. 4Keep Excel running in parallel until the flow is stable. Compare outcomes daily: drift, you know immediately.
5. 5Once trusted, decommission macros first, then formulas. The spreadsheet survives as a presentation layer.

None of the above fits?

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