What happens when I turn off Calendar Sync or uninstall WitnessWork?

In Settings → Preferences → Calendar Sync, choose Turn Off Calendar Sync, or choose Turn Off on a Calendar updates paused notification. On the primary device, the one that updates your calendar, you can keep the events already added or remove them. Remove Events removes the marked events from the selected calendar, including previously exported history; unrelated events and the calendar itself remain. Turning it off on the primary stops updates from every device. On any other device, Calendar Sync turns off on that device only and the events stay. Events you keep, or that are left after uninstalling, are no longer updated until you set Calendar Sync up again. Uninstalling WitnessWork does not remove calendar events. You can remove an unused dedicated calendar in your calendar app after checking that it contains nothing you want to keep. Turning off Calendar Sync does not delete your Contacts, Visits, or Follow-ups in WitnessWork.