I have a user that has an Office 365 Outlook 2010 profile set up. For the most part it works fines but every couple of weeks/months it goes through a "Verifying Data Integrity" process which can take up to 1-2 hours to complete. I have recreated this profile a number of times but after a couple of weeks/months this happens again. Is there something else I should be looking at? What is the reason for the data integrity check?