Mark a message as important or urgent in Teams
https://support.microsoft.com/en-us/office/mark-a-message-as-important-or-urgent-in-teams-ea99d5b6-1317-4550-8d75-86ff14cd4462
To help make sure your message gets noticed, mark it as important or urgent. To do this, select Set Delivery Options beneath the compose box, and then select Important or Urgent. This adds the word IMPORTANT! or URGENT! to your message. Once in the message, you can include files, links, or pictures—whatever is needed to get your point across.
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