Hi! Mac. Thanks for the details. You described it exactly as it typically behaves when this issue occurs.
For best practices, if ordering is important, make all ordering changes on one “primary” device and open the list on others shortly afterward to refresh the order.
But here's the basic workaround:
Force a full sync on all devices
Sometimes the order has changed on the server, but the app hasn’t refreshed:
- On each device:
- Go to the Settings → Sync and tap Sync now (on iOS/Android).
Just note, Microsoft To Do currently does not guarantee cross-device sync of manual order unless the list is open. It’s a known behavior, so it’s more of a sync design gap than a bug in some builds.
See if this helps. If you need further assistance, just let me know.
Best regards,
Kimberly