I recently switched our primary CAS servers over from a single exchange 2010 cas/mailbox/hub server to a couple new exchange 2013 CAS/Mailbox servers. Exchange 2013 has cu3, and is hosted on windows server 2012. Anyone who has their mailbox hosted on one of these exchange 2013 servers has an issue where they must click the send/receive button to get new messages downloaded to their client. This is only the case for outlook 2011 for mac client. Activesync clients, mac mail, OWA, and Outlook 2010/13 all behave normally.
Where can I look or what can I check to troubleshoot this issue?