Missing a shared calendar from Microsoft?

If you've added a shared Microsoft calendar but it's not showing up in Year Glance, this is usually because it was added using the legacy Outlook app, which can register shared calendars differently and stop them from being visible to Year Glance. 

To fix this:

1. Open the new Outlook app or Outlook on the web,
2. Remove the shared calendar
3. Add it again from there. 
4. Once that's done, go back to Year Glance, open Connected Calendars 
5. Click the refresh calendar list (refresh icon next to the calendar account). 

The shared calendar should now appear and stay in sync going forward.