What happens
Sometimes a preview run doesn't finish cleanly. Each of these is shown clearly on the Review step, with a way forward.
If you run into a problem
- Some steps show "Halted" — dry-run records are projections only, so later steps sometimes can't link against them yet; this is expected on a fresh tenant and will succeed in the real migration. If there are blockers listed too, get in touch with us to resolve those first (see Preflight blockers and tenant setup); otherwise it's safe to continue.
- Preview was cancelled — if you select Cancel preview and confirm, the run stops before completing; no data is written, and you can run it again at any time.
- Preview failed — you'll see "Something went wrong during the preview," optionally naming the step it stopped at. Select Run again.
- Attached to an already-running preview — if you return to this step while a preview from another session is still running, you'll see this note; results appear when it completes.
- Continue to migration is disabled — hover the button to see why: the readiness check is still running, blockers above need resolving, email conflicts are blocking, the preview failed, is still running, or hasn't been run yet.
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