Microsoft will be retiring its PowerPoint recording tool Office Mix as of 01 May 2018. Microsoft is splitting up its functionality and implementing it directly in PowerPoint and other applications. If you have any presentations in your personal accounts it is highly recommended that you to back up your recordings following the steps below.
Step-by-step guide
Go to https://mix.office.com/.
Click Sign In (upper right) and select Sign in with a work or school account.
Sign in using your University email information.
Click My Mixes (top of the page). If you have published any Office Mix presentations they should be listed here.
For each published presentation, click this button
The PowerPoint version of the presentation will be downloaded to your computer. Should you also want a copy of the video output, click the the Video button (if available).