Office 365 Disables Flash and Silverlight Controls

Upcoming releases of Office 365 ProPlus will block activation of Flash, Shockwave, and Silverlight controls within documents. These controls, once popular for delivering interactive multimedia content, are facing security and end-of-life issues and have low reported utilization. Adobe will discontinue support for Flash and Shockwave in 2020, and Silverlight controls reach end-of-support in 2021. These controls have been used for malware and phishing exploits that target Office end users who open documents with the controls embedded.

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