Outlook 2016 Conditional Formatting in calendar part of To-Do Bar


Outlook version
Outlook 2010 32 bit
Email Account
Exchange Server
I created conditional formatting on my calendar to indicate whether I'm a Required Attendee (dark red) or an Optional Attendee (light red) for appointments and meetings. I was dismayed to discover that the formatting did not apply to the Calendar portion of the To-Do bar.

Any suggestions on how to have a similar effect in the Calendar portion of the To-Do bar? If I manually categorize items in the calendar with colors, those colors will apply to the Calendar portion of the To-Do bar, but that defeats the purpose of automatically applying formatting.

Is there a way to have rules automatically apply categories to meetings/appointments when they are created?

Thank you for any thoughts.