iCal can't sync recurring events to Exchange 2013

My iCal on my MacBook keeps crashing when trying to sync recurring events...

Upon adding the Exchange account all events sync but after a while there pops up a message saying: "iCal can't save the event *Event Name* to the exchange server"

I tried to Revert to Server and tried Try again but all of that didn't help. After a ignoring all the popups from all the recurring events my calendar won't synchronize at all anymore..

We have had no problems about a month ago when all was still running on Exchange 2010 so i think that might have to do something with it.

I'm currently running the latest version of iCal and also the latest version of OS X Mountain Lion.

Anyone got any ideas how to solve this problem? Thanks in advance!🙂