I have a user on Windows 7 64bit using Outlook 2010 32bit in cached mode who gets an email about sync issues everyday. The backend is Exchange 2013 CU3 in a two node DAG. This user was migrated in March from Exchange 2007. So far we have recreated her local mail profile and applied hotfix http://support.microsoft.com/kb/2606009
which addressed another sync error she was getting. Somewhat at a loss as far as next steps. Error screen capture is attached.