Hi RachelW,
Unfortunately the picture didn't seem to come through with you last post.
But regarding the Logon Task or Shortcut. What you can do is create a Logon Task with the command to execute Teams (use asynchronous). You can use conditions to have this executed for (for instance) a sub set of users.
Image may be NSFW.
Clik here to view.
The other option is to place a shortcut in the Startup folder. This way the shortcut is executed after logon. You can use conditions to have this executed for (for instance) a sub set of users.