Attending a Microsoft Teams Meeting

To attend a Teams meeting, you are usually sent a link, and you just need to Tab to the link in the email, and press Enter.
Alternatively, you attend from a Teams event in your calendar, which contains the link.
When you select the link to join a meeting, the Teams application starts and you get a Join Meeting dialogue. Here you can type in your name. Then Tab through the different options for background settings, audio and video. Eventually, you will Tab to the Join Now button, so just press Enter.
If you use a screen reader, it will confirm at the Join Now button whether your mic and video are on.
To leave a Microsoft Teams meeting, press Control + Shift + H.
Alternatively, just close the meeting window with Alt + F4. It may ask you if you are sure, so just Tab to the Leave button and press Enter.