Since 2007, Outlook began to use Microsoft Word as it’s text editor. Why is Outlook 2007 – 2016 not Able to Play my GIFs?
Microsoft uses new editor similar to Word, meaning continued issues. Microsoft started using Word as an editor, resulting in loss of HTML functionality.
If you have issues with GIFs in Outlook, have a quick look at the table below to check if your version has a problem, and read on for a quick fix.