We've been trying to get a Blackberry Z10, as well as a few iPads and Androids, going through Data Synchronizer, and have worked out most of the problems, I think, but our lone z10 is displaying another user's address book. The only account on the z10 is the GroupWise one (no personal accounts have been added to confuse things) and the address book is displaying that user's entries, but also another user's (school and family entries that could only have come from one person in our office).

Her desktop client displays the correct address book.