Export animated GIFs with transparent backgrounds

We have started rolling out the ability to export animated GIFs with a transparent background in PowerPoint to Office Insiders.

How to create an animated gif that doesn't simply change frames - Quora

How to make a video(WebM) with a transparent background - Honeycam

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GIMP How to make existing gif background transparent - Graphic Design Stack Exchange

How to Make an Animated GIF in Photoshop [Tutorial]

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Making Animated GIF's of ANSYS Graphics for Fun and Profit - PADT

How to Make Animated GIFs with Transparent Background [Solved]

How to Create a GIF Using After Effects

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Color and quality loss with similar colors or from RGBA · Issue #6832 · python-pillow/Pillow · GitHub

How to Create a GIF with a Transparent Background