Faithful is not the goal
Legacy CRMs accumulate years of drift: duplicate accounts, inconsistent formats, dead fields, and mappings that made sense to someone who left in 2019. Migrating all of that faithfully into Salesforce is a wasted opportunity; you have paid for a project and kept the mess.
The migration is the one moment you have every record in your hands. It is the time to fix them.
Transformation as a first-class step
We treat transformation as explicit, testable logic, not a pile of ad hoc fixes. Field mappings are documented, normalisation rules are visible, and duplicates are resolved with a rule you can defend rather than a guess. In one migration of over two million records across five legacy systems, custom transformation logic and a staged rollout let us finish 60% faster than the original fifteen-week estimate, with zero data loss.
Explicit logic also means the decisions are reviewable. When finance asks why two accounts merged, there is an answer, not a shrug.
Arrive clean
The payoff is that Salesforce goes live with data people trust from day one. Reports reconcile, automation fires on clean inputs, and the new org is not carrying the old system's baggage. A migration done this way is an upgrade, not a transplant.
Key takeaways
- Faithfully migrating dirty data just produces a clean copy of a mess.
- Make transformation explicit and testable: documented mappings, defensible dedupe rules.
- One five-system migration finished 60% faster than estimate with zero data loss.