Outlook Zoom Extension no longer displaying Join Online Button

In my Outlook client on Windows 10 (build 2304 v16327.20324) I don't see the "Join Online" button on either the reminder window or the calendar/to-do bar (right side of outlook window). 

This DOES work on Outlook on the Web, iOS (calendar item, join button visible) and the "NEW" Outlook (which seems like an exe wrapped version of Outlook on the web).

I tried removing and reinstalling the extension from Outlook but no improvement.

Teams meetings show the Join Online button properly in Outlook reminders/to-do bar.

Thoughts? Is this working for anyone at the moment in Outlook client on windows?

Thanks