Microsoft to block embedding Flash, Shockwave or Silverlight content in Office 365 files. Starting next month, Office 356 will start blocking these for monthly subscription users. The same thing happening for business users on the Semi Annual (SA) Channel by January 2019. Microsoft could have probably have pulled the feature a while ago without upsetting too many customers. Cybercriminals have taken to hiding malicious content inside Excel, PowerPoint and Word files. Microsoft has been treating Silverlight like a bad smell since Windows 10 arrived in 2015.”]