We have improved support for Unicode characters (including special characters and emojis) encoded with two, three, or four bytes in UTF-8. 

The improvements were implemented for email messages filed by the Email Manager, Classic Outlook Plugin, or Lite Outlook Plugin.

You can see here an autoresponse from the Email Manager that has correctly handed back to me my test email with correctly rendered Emojis.

And if I then choose to save the record using the Outlook Plugin (in my case I’ve used the Outlook Lite plugin) the Emojis are stored and rendered correctly within Sage CRM’s interface.