How would you migrate an existing nurture programme from a legacy tool into Engagement Studio?

I would map before I build. Document the current programme as a flowchart: entry criteria, every email, every wait, every branch condition, and every exit. Legacy programmes almost always contain branches nobody remembers adding, and this is the moment to prune them.

Then translate the constructs: waits and behaviour-based branches become triggers; instantaneous conditions become rules; sends and field updates become actions. Assets have to be rebuilt as Account Engagement email templates, with links converted to tracked links and personalisation rebuilt using Account Engagement merge fields.

Data comes next: the prospects and the fields the branching depends on must exist and be populated before anyone enters, or prospects take the wrong path silently.

Before launch I run test prospects through every branch in test mode, including the unhappy paths. Then I run both programmes in parallel for a short period with a small cohort, compare outcomes, and only then switch the entry list over and retire the legacy programme.