A Rollup Update has been released for Outlook 2013. This is a non-security update which contains the following fix.
- When you reply or forward digitally signed messages with Secure Multipurpose Internet Mail Extensions (S/MIME), Outlook 2013 incorrectly blocks images in the email messages.
View: Download information for KB4464546
Note: This update can be installed via Microsoft Update or the Update Now button when you are using Office 2013 Click-To-Run and updates Outlook to version 15.0.5137.1000.