Message everyone on a team

You can get the attention of an entire team or channel using @team or @channel. 

See this Microsoft support article for further instructions: https://support.microsoft.com/en-us/office/use-mentions-to-get-someone-s-attention-in-teams-eb4f059d-320e-454e-b111-03361d4d6855?ui=en-us&rs=en-us&ad=us

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