I have one user in our organization that every couple of weeks, has thousands of duplicates show up on her S3. The most we've run into was 8k duplicates of the same contact. To fix this so far we have logged into the light version of OWA and
deleted them 100 at a time. This is not a long term solution. The below thread makes it sound like I'm turning Sync if off for the whole organization which I cannot do.
http://social.technet.microsoft.com/Forums/lync/en-US/78807060-923f-4425-a85f-883dafd1a393/lync-duplicate-contacts-sync-from-outlook?forum=ocsclients. If I am reading it wrong, please let me know.
We are running Exchange and Lync 2010, and Outlook and Lync Client 2013 patched up to the latest version. Back end and front end are all the latest version. The android version on the S3 is (4.4.2).
This link http://support.microsoft.com/kb/2916650 seems to suggest Microsoft thinks they've fixed it, but it has not helped for us as we already have the latest versions installed. We're above
these version numbers on both client and server.
If there is any other information you need please let me know. I'm sure I left something out.