We have a user that is using Office 365. In Outlook (and in OWA), he has 3725 contacts. None of these contacts show up when creating a new email and clicking on TO: If I select the address book, I can sporadically see contacts in the card view, and business card view (usually one or the other but not both) and I can never see the list view. I don't know if that's because there are so many, but I have let it run for a long time to see if it would eventually populate. If I search for a name in that contact list (that I know is there), it says nothing is found. Everyone else in the office (8 users) have the exact same setup (except not so many contacts) and no one else has the problem. I currently am running scanpst.exe to see if it can resolve the problem. I have checked indexing, I have checked to make sure 'show this folder as an email address book' is selected. The user is very unhappy. Can anyone help? Thanks in advance!