What does migrating from one CRM to another actually involve?

Migrating a CRM sounds like a data export and a data import, and teams that treat it that way consistently get burned — custom fields that don’t map cleanly, years of activity history that doesn’t translate, and reps who discover on day one that half their saved views are gone. The transfer is the easy part; everything around it is where migrations actually fail.

What does the migration actually cover?

A full migration means moving accounts, contacts, opportunities, activity history, and often custom objects, while re-creating the equivalent of every workflow, permission structure, and integration the old system had. It’s rarely a straight lift — most CRMs structure similar concepts differently, so a genuinely complete migration is a redesign of the data model in the new system’s terms, not a copy-paste.

Why is field mapping the hard part, not the transfer?

Every CRM has its own object model — what one calls a “deal” another calls an “opportunity” with different required fields, and custom fields built up over years rarely have a clean equivalent waiting on the other side. Before any data moves, someone has to map every field and object one-to-one (or decide to drop/merge some), which is exactly the moment to also run data cleaning and deduplication — migrating in duplicate or stale records just gives the new system the old system’s data problems on day one.

How should the actual cutover be run?

A single hard cutover — turn off the old system Friday, turn on the new one Monday — maximizes risk if anything was mapped wrong, since there’s no old system left to check against. A parallel period, where both systems run simultaneously for a few weeks with data syncing or manually double-entered for critical records, catches mapping errors while there’s still a reference to catch them against. It costs more in the short term and is worth it for anything beyond a very small team.

What should you do next?

Start the migration by auditing and cleaning data in the old system before any mapping work begins — migrating clean data is strictly easier than cleaning it in an unfamiliar new system afterward. Then build the field-mapping document as its own deliverable, reviewed by someone from both sales and ops, before scheduling any actual cutover date.