Access Notification Settings

1. In the top right of the Teams App, select the Settings and more (…) button next to your account icon, then from the dropdown menu select Settings.
2. From the Settings menu on the left side of the App, select Notifications and activity.

Manage Specific Notification Settings 

 Microsoft provides instructions for adjusting specific notification settings in Teams.

• Mute distracting notifications during Teams meetings. You'll still be able to allow activity-related alerts.
• Manage calendar notifications such as new invites, updates, cancellations, and when meetings have been forwarded.
• Manage general notifications to configure sounds, and when notifications display.
• Set frequency of missed activity emails, or turn the feature off.
• Customize chat and channel notifications such as @mentions, tags, replies, likes, and reactions.
• Manage meeting notifications such as meeting start announcements and chat notifications.
• Manage Apps notifications to display in your Activity, as a banner, or to be turned off.
• Configure channel notifications to include new posts, replies, mentions, and change whether they display as a banner or in the feed.