How to add a Custom Background to Microsoft Teams
1.> Open Microsoft Teams, and click the "Chat" button, start the call to 1 or more people
2.> Select "More Actions" (Three dots)
3.> Click "Apply background effects"
4.> Select "Add new"
5.> Upload your customised background image
6.> Select the "Apply" button. All future calls shall have the same background as the default background for all subsequent Team calls.
Note: Your Teams background may appear backwards to you. The background will will display correctly to everyone else on the call