​If you are using Office 2016 or Office 365 you may be impacted when using PowerPoint, Excel or Word.

For security reasons new builds of Microsoft Office for Office 365 block activation of Flash, Silverlight, and Shockwave controls. Most users won’t be impacted, but for some users this may cause one of the following issues:

  • When you click on an embedded Flash movie in PowerPoint Slide Show, nothing happens even though this worked before
  • Power View in Excel does not work anymore (because it uses Silverlight). You may see an error message that says "Activate method of OLEObject class failed".

See https://support.office.com/en-us/article/flash-silverlight-and-shockwave-controls-blocked-in-office-2016-55738f12-a01d-420e-a533-7cef1ff6aeb1?ui=en-US&rs=en-US&ad=US