This feature request has been declined.
Currently if you have the Teams app set to run in the background upon clicking the “X” in the upper right, the app stays active only in the system tray. If you receive chat messages, it still remains in the SysTray.
However, if you get an @mention, the focus pulls it to the Taskbar. This is by design since you are getting directly mentioned and some action is typically expected. This is a key design element which the team does not wish to deviate from.
We appreciate the suggestion but will respectively decline it at this time.
Thank you for the feedback and suggestion.
We’re currently working on defining a compact mode experience. I will post more details when we have more to share.
We’re pleased to announce the Teams client for Linux is now available for preview. Please see details at https://techcommunity.microsoft.com/t5/Microsoft-Teams-Blog/Microsoft-Teams-is-now-available-on-Linux/ba-p/1056267.
Please check out the Q&A forum here – https://docs.microsoft.com/answers/topics/teams.html.