Hopefully this quick easy fix will work for you and save the hassle downgrading to 32 bit or even reverting back to Office 2013. This easy fix worked for us straight away however according to Microsoft forums some users suggest that after Outlook has been closed and reopened several times the problem comes back, although we have not experienced this yet! Outlook uses the format of the original message in a reply, even if the Compose messages in this format option is set to HTML. You are replying to or forwarding an email message that you received in plain text format. Untick “Reduce message size by removing format information not necessary to display the message” In the File > Options > Mail dialog box, the Compose messages in this format option is set to Plain Text. Navigate to the Mail section and scroll down to Message Format This isn’t a great solution and so until Microsoft release a fix we found a quick way of resolving this issue: The particular problem seems to lie with the 64 bit version of Office and does not seem to have been reported on any 32 bit version causing some users to downgrade to 32 bit. Whilst displaying html content should not be difficult for an email application, many users with 2016 seem to be experiencing it (see here - ).

Having upgraded to Office 2016 Professional earlier this month I have come across a frustrating issue within Outlook – an email with html content is not displayed correctly, the alignment is all off and a horizontal scroll bar is displayed so you have to scroll right to see any content. UPDATE: Unfortunately this issue has returned after using Outlook for a while, however closing and reopening Outlook seems to fix it again (temporarily).

Outlook plain text setting