Microsoft is aware there are issues with the Outlook, Exchange and the release of El Capitan.
Can someone help me on this? Mac OS X El Capitan arrived with many errors and compatibility issues. Exchange server calendar with Microsoft Office 2011 not working since El Capitan was installed. Organizations and Microsoft, however, are moving away from that practice. Many organizations and users are accustomed to purchasing a Microsoft Office license with a new Mac and sticking with that Office version for the life of that Mac.