When using Microsoft Teams, all of your notifications appear in your Activity feed. You will receive notifications when another team member or guest:
@mentions you (you also see your @mentions in the conversation)
@mentions teams and channels you belong to
Replies to conversations you're part of
Replies to your replies
See this support article from Microsoft Support for instructions: https://support.microsoft.com/en-us/office/check-a-channel-for-notifications-in-teams-56cae2de-69c0-445e-ae7f-7d8f5d205857?ui=en-us&rs=en-us&ad=us
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