What Teams Presence states will show me as busy on my other devices?

When subscribing to your Teams presence, you will be set as busy on all of your devices when the following presence states are active:

In a call will be active when you are in a Teams call.

In a meeting will be active when you have created a Teams meeting directly in the calendar, in Teams, or you part take in a Teams meeting. The state may also activate when you create a Teams meeting in your Outlook calendar and choose to show as busy.

If you create a regular meeting in you calendar, you will not get this status and your other devices will not show you as busy. 

Presenting will be active when you share a screen during a Teams meeting.