Additionally, if Macintosh clients are used, then Microsoft Outlook for Mac 2011 or Outlook 2016 for Mac should be used. When you use the delegate feature in Microsoft Outlook, we recommend that the manager and all the delegates use Microsoft Office Outlook 2007 Service Pack 2 (SP2) or a later version, and this includes Microsoft Outlook 2010, Outlook 2013 and Outlook 2016. Outlook 2016 Outlook 2013 Microsoft Outlook 2010 Microsoft Office Outlook 2007 Outlook 2016 for Mac Outlook for Mac for Office 365 More.