Entourage is email client that help to manage emails, notes, contacts, appointments, calendars and many other things in better way. It also stores all the valuable data in a single database and creates unique identity. This includes tasks, emails and other information. Entourage database also gets corrupted that result in inaccessibility of data. The reasons for corruption are due to virus attack. For more info: http://entourage.filerepairtool.net