2Do currently only supports syncing with CalDAV servers (such as Fruux, Yahoo!, SabreDAV, Oracle, iCloud Reminders and so on), Dropbox and Toodledo. Although iCloud Reminders supports syncing with Exchange, and your Exchange account along with its lists may appear in Reminders, linking 2Do with Reminders will not result in syncing with your Exchange account. Reminders only conveniently displays the lists together with other lists in Reminders.