Unsupported Outlook Client Versions
Outlook 2003 is no longer supported in any way.
Outlook 2007 is no longer supported in any way.
Entourage 2004 for Mac is no longer supported in any way.
Entourage 2008 for Mac is no longer supported in any way.
Supported Outlook Client Versions
While there is some backwards compatibility with other older versions of Outlook, there are tight restrictions on what will and won't work correctly with Exchange 2016.
Outlook 2010 with KB2965295 is supported. Older versions of Outlook 2010 that has not been updated to this level are not supported. The update is HERE
Outlook 2011 for Mac is fully supported.
Outlook for Mac for Office 365 is fully supported.
Outlook 2013 is fully supported.
Outlook 2016 is fully supported.
