I did not upgraded to Mavericks just to avoid this, but immediately after the automatic upgrading of iTunes to 11.1.3 my outlook is no longer syncing with Mac Calendar and address Book (and as a consequence does not longer sync with my phone)

I have tried everything, including downgrading the iTunes (which did not seem feasible after thousands of trials) 
Could anyone help me? this is really frustrating -
  
I have MS Office for Mac 2011 (University) installed on my iMac with Mac OS X Lion 10.7.5 (11G63) all seems to work ok except that I am unable to sync my iPhone and iPad calendar with Outlook. I seem to be missing a step which is not evident? Please could you help?

I am wondering about MS Exchange = Im not sure that this is, I dont understand DAV and what that is; do I need to set up a Hotmail account? It is not evident why I am unable to sync over WiFi? 

many thanks

colpol
 
I have a Windows Phone 7 and have been reasonably happily syncing my calendar from my work and home PC versions of Outlook using Hotmail calendar. However I have now moved to a Mac-based office running Office for Mac. I would love to be able to sync my work calendar with my phone - in fact it's essential. Any suggestions?