Just installed a pair of Exchange 2013 servers in our organization and have configured a load balancer for access. Mail flow, Activesync, calendar, etc.. are all working as expected but some emails display the Action Items link in Outlook. When I click on it, the section expands and a 404 error is displayed. If it were a connectivity issue with the load balancer I would expect to get a 'cannot access page' message. This page is obviously generated by Exchange (if I scroll down it shows the same visual style as the Exchange 2013 OWA page). I've tried searching solutions online and find plenty of information on developing Mail Apps but not much on administering them. Anyone else run into this problem and/or know how to fix it?
Thanks!
-Nick