One that protects our users from malicious attacks without disrupting day to day productivity for most of them.Silverlight More. In closing, we believe this is another step forward in elevating the security of Office. Please refer to support guidance published here if you need to unblock controls critical to your workflow.

While we are confident that this will not impact most Office users, we do understand there is potential to impact some of our users and we apologize for the inconvenience caused as a result.

Controls are blocked in Office 365 Semi Annual (SA) Channel starting in January 2019.Ĭan I unblock these controls if I need to?.Controls are blocked in Office 365 Semi Annual Targeted (SAT) Channel starting in September 2018.Controls are blocked in Office 365 Monthly Channel starting in June 2018.This change only applies to Office 365 subscription clients and is targeted to take effect in the following order Note: this change does not cover scenarios where these controls are activated outside the Office process, for example, a Flash video inserted into a document via the Insert Online Video functionality. Controls invoked by extensibility components within the Office process, for example, Power View add-in that uses Silverlight.Controls directly embedded in an Office document, for example, Flash video directly embedded within a PowerPoint document using the Insert Object functionality.Some examples of scenarios that would be impacted by this change are: This change blocks the activation of the following controls within the Office process. It will not apply to Office 2016, Office 2013 or Office 2010.Ĭustomers who wish to enforce this behavior now in Office 365 subscription clients or in Office 2016 perpetual and down level versions can use the guidance published here to block controls targeted by this change.įurthermore, customers can also take advantage of the recently published Security Baseline for Office 2016 that includes a custom Group Policy that blocks Flash.

Note: This change only applies to Office 365 subscription clients. Silverlight is expected to reach end of support in 2021 with support for several browsers and OS platforms already ended in 2016.Major browsers including Edge, Chrome, Safari and Firefox have announced their respective roadmaps for ending support for Flash. On July 2017, Adobe announced that Flash will no longer be supported after 2020.Upcoming end of support for some these components.Low observed use of these controls within Office.Use of some these controls in exploit campaigns to target end users of Office.We are taking this step based on the following factors: Today we are announcing an upcoming change to Office that blocks activation of Flash, Shockwave and Silverlight controls within Office.

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