Office 365 - Microsoft Teams - Manage Notifications
How to manage your notifications for Teams
*Note: These directions are for the desktop and web-based versions of Microsoft Teams.
There are multiple ways to access and manage notifications. To further customize your notification settings, select your profile picture at the top, right corner of Teams, then select Settings > Notifications. From there you can fine-tune what notifications you receive and where those notifications show up.
In Activity on the left side of Teams, select More options on a notification. From the menu, you can mark a notification as read or unread. You can also turn on or off notifications for a specific channel if you want.