Customize the Appearance in Microsoft Teams Free

Select  More .

Select Settings .

Select Appearance .

Select Light,Dark, or System Default.

Select Restart. When Microsoft Teams Free restarts, your theme will be changed.

Select your profile picture or More .

Select Settings .

Select Appearance .

Select either Light or Dark.

Select Close app. When you open it again, your theme will be changed.

Open Microsoft Teams Free

Select Settings and more near your profile picture.

Select ​​​​​​​ Settings .

Select Appearance.

Under Theme, from the drop-down you can select:

1.  Follow operating system theme, Light, Dark, or High Contrast.

2. You can also turn Always use dark theme for meetings and calls on or off.

Your theme will change to your selection.