Controlling settings, permissions, and membership within Teams and channels
Hi Josephine Kutchenrider,
Welcome posting in the forum.
We have known that you request is to clear the notification bubbles on the left side of Teams.
Given this situation, even though we do not actually have an “ mark all read” button, but customer can turn off the notification in Teams. Please try to follow the below steps:
1: turn off the notification in the Teams and Activity area:
Select Teams > select Team Channel > click on (…) More option > select Channel notifications > turn off all things > click on Save.
2: turn off the notification in Chat:
Click Profile picture> Select Settings option > Select Notifications option > set notification as per below screenshot.
For more info about notification in Teams please see Manage notifications in Teams
If you tried the above methods and need more assistance, please feel free to post back.
Regards,
Grace