Hi @TempStar
In Teams, you can mention a person, a team, a channel or a tag.
If you want to mention all IT members in a channel post, you can create a tag for all IT members in the team and just mention the tag name in the post.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.