The activity feed in Microsoft Teams is the user’s single inbox for all activity across Teams. The feed aggregates important content from the following: If your app posts cards and other messages into a channel, they’ll automatically show up in the user’s feed if he or she has followed that channel.
Activity feed basics
Select Activity 
to view your Activity feed, a summary of everything that’s happened in the channels that are in your teams list. Select Filter 
at the top right corner of the feed to show specific types of messages such as unread messages, @mentions, replies, and likes.
When a red circle appears next to Activity , you have a notification—such as an @mention or a reply—in your feed. These notifications remain in your feed for 14 days. After that they expire and no longer show in your feed.
Notes: Another way to check your notifications is to use the command box at the top of Teams.
- Type /unread to view your unread channel notifications.
- Type /mentions to view all your @mentions.
For a more specific feed, go to the Feed menu and select My activity. You’ll get a list of everything you’ve been up to lately in Teams.
Activity feed symbols
We attached unique symbols to different types of notifications in your feed. That way, you can look through your feed and prioritize based on the following:
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@mentions of you specifically. |
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@team mentions for teams you’re on. |
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@channel mentions in teams you’re on. |
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Replies to your posts. |
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Posts you liked. |
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You were added to a team. |
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You were made a team owner. |
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Trending posts. |
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Suggested posts. |