My work computer is a Mac and I run the latest version of Mac OS with Outlook 2011 (through the 365download for Mac).  My home computer is the PC version of the new Outlook 365.
When I get home and turn on my home computer, every day it says that I have dozens of new emails, it doesn't mark the ones I read during the day at work or on my phone as being read. 
Does anyone know what settings I have to fix to get it so that Work - Phone - and Home (Mac, iPhone, and PC) can sync to the latest emails that have and have not been read?