In this episode of M365.fm, Mirko Peters explains why Excel is great for analysis but fundamentally broken as the data backbone of a Power App — and how Dataverse fixes the mess before it explodes in production.

WHAT YOU WILL LEARN

• Why Excel collapses the moment your Power App goes from one user to a real team
• How silent data corruption, last‑save‑wins, and broken formulas destroy trust in your app
• Why structure drift (columns changing, copies everywhere) is the real enemy of governance
• How Dataverse brings schema, transactions, security roles, and auditing into your Power Apps
• How to think about Dataverse vs Fabric Lakehouse vs SQL vs “just keep it in Excel”
• A practical 10‑step path to migrate an existing Excel‑backed app into Dataverse

THE CORE INSIGHT

Excel feels safe because it’s forgiving — anyone can change anything, anytime. That freedom is perfect for modeling and individual analysis, but lethal when your spreadsheet becomes an operational system. When multiple users edit the same file, you get last‑save‑wins, silent overwrites, and drift between versions that only show up months later as “unexplainable” numbers.Dataverse solves the problems Excel was never designed to handle: required fields, proper data types, relationships, role‑based security, ACID transactions, and a real audit trail. Instead of hoping your spreadsheet behaves, you let the platform enforce rules, integrity, and access while Power Apps focuses on the experience.

WHY EXCEL FAILS AS A BACKEND

• No concurrency control: two saves at once means valid updates are silently lost
• No schema enforcement: columns, types, and IDs mutate as people improvise
• No referential integrity: relationships exist only in formulas and people’s heads
• No real audit log: you can’t prove who changed what, when, or why
• Constant drift between “master” files, emailed copies, and SharePoint versions

WHAT DATAVERSE GIVES YOU INSTEAD

• Real schema: required fields, data types, keys, and lookups
• Real security: role‑based access, row‑level ownership, and field‑level control
• Real integrity: transactions, referential constraints, and server‑side validation
• Real governance: audit trail, DLP, environments, and predictable APIs
• Real performance: multi‑user concurrency and scalable, queryable storage

YOUR MIGRATION PATH (HIGH LEVEL)

• Inventory Excel‑backed apps and classify the risk
• Extract real entities, keys, and relationships from your workbook
• Design a Dataverse schema that matches how the business actually works
• Set up environments, security roles, and DLP policies
• Transform and load your data, then validate and dedupe
• Point your Power App at Dataverse, run a staged cutover, and finally deprecate Excel as the source of truth

WHO THIS EPISODE IS FOR

This episode is ideal for Power Apps makers, Power Platform admins, solution architects, and business owners whose critical processes still run on “just a spreadsheet” behind a canvas app. If your Power Apps read or write to Excel — especially in SharePoint — this conversation gives you the language and roadmap to move to Dataverse before your luck runs out.

ABOUT THE HOST
Mirko Peters is a Microsoft 365 consultant and digital workplace architect who helps organizations move from spreadsheet‑driven operations to governed, scalable platforms on Power Platform, Dataverse, and Fabric. Through M365.fm, Mirko shares practical migration stories, data‑model patterns, and governance approaches that help IT and business teams replace fragile Excel “systems” with resilient applications that stand up to real users and real audits.

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