Changing Teams picture in new Microsoft Teams

With the introduction of new Teams, the method for changing the Team site picture has been updated, and the stock images are no longer available. We have reached out to Microsoft to see if the stock images will be added back to new Teams, but signs of this happening any time soon are low. For now, if you wish to change the Teams picture, you will need to source this.

Please see the below guide with the updated change:
Changing Teams picture in Microsoft Teams