Remember the 16×16 and 32×32 icons? Well, you don’t need them any more:) All you need to think about now are the .svg icons that adjust accordingly to what it should.
The issue at hand is one we all know and hate. The little puzzle image that indicates that you didn’t take the time to complete everything 100%. In my case I created a custom entity called Project.
https://www.flaticon.com <– Go here to get a hold of any icon you want. Free if you give credit to the author of the file. Remember that you have to download .svg file format.
Open your solution and add a new webresource of type .SVG. Remember save and publish!
Unfortunately you now have to navigate to the Classic view, because this is currently not available in the PowerApps configuration yet.
Open the icon update, and select your new webresource Project Icon. Save and publish the entity.
Open your UI app, and voila!! Everywhere will now have the correct icon because Dynamics 365 UI is automatically formatting this to the correct size 🙂