A notification that Office Mix is retiring on May 1, 2018 is displayed when you open the official Office Mix website right now (I'm writing this in April 2018).
Microsoft made the decision to display a page overlay notification and a banner notification at the top of the page to highlight the news to users of Office Mix.
The overlay reads: "Office Mix is retiring May 1, 2018. Please sign-in to migrate or download your content from the Office Mix site before May 1, 2018 to avoid losing any of your data. For support migration contact us here".
The banner at the top has a slightly different message and provides additional information: "Office Mix is retiring on May 1, 2018. Starting April 6, 2018 you will no longer be able to upload new or update existing recordings using the Office Mix add-in for PowerPoint. Please sign-in to migrate or download all your content".
Office Mix was a free add-on for Microsoft PowerPoint that never left the preview stage. Office Mix added interactive elements like quizzes or polls to PowerPoint presentations and integrated options to upload new mix content to the web, OneNote or other learning environments.
Users cannot create new content as of April 6, 2018. Those who have not exported the data yet have time until May 1, 2018 to do so.
Any content on Office Mix starting on the day of service retirement won't be accessible anymore. Links that point to content won't work anymore, and certain add-in elements such as quizzes or polls may no longer be available either.
Existing users may do the following to migrate their content:
Office 365 work or school customers:
This migrates mixes to Microsoft Stream. Note that this won't include quizzes, analytics data or apps.
Microsoft account customers:
Additional information and instructions are published on this Support page on the Office website.
Now You: Have you used Office Mix?
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