Outlook RSVP via keyboard?

When a meeting is canceled by its owner, you get an Outlook message notifying you, with a “Remove from Calendar” button. Is there a way to interact with that button via keyboard? Similar with RSVP buttons? As far as I can tel they are not focusable via keyboard. I am usually able to go through my email using only the keyboard, but when I get to Outlook calendar invites I need to reach for the mouse. Thanks!