You can join a Teams meeting anytime, from any device, whether or not you have a Teams account. If you don't have an account, follow these steps to join.
Note: For some meetings, admin settings prevent people who are not signed in from joining the meeting.
Go to the meeting invite and select Click here to join the meeting.
That'll open a web page, where you'll see two choices: Continue on this browser and Join on the Teams app. You don't need to install the Teams app to join the meeting.
If you join the meeting on your browser, Microsoft Edge or Google Chrome both work. Your browser may ask if it's okay for Teams to use your mic and camera. When you select Allow, you can always turn off your mic and/or video once you join the meeting.
When you're ready, select Join now.
Tip: Join the meeting up to 15 minutes before the meeting start time to test your setup, troubleshoot, or see how Teams works. Meeting organizers and participants won't be notified that you've joined the meeting until 15 minutes before the scheduled start time.
If you enter the meeting lobby, wait for someone in the meeting to admit you.