Outlook Calendar Response
Outlook Calendar responses should have editable 'To' and 'CC' field so that recipients can be added as per requirement.
Jim Riley commented
In outlook for Windows, I often used the ability to CC someone on a response to a calendar invite. e.g., “I can’t join the meeting, but am copying *** to ensure they join to represent me”. In Outlook for Mac, I can only reply to the person who arranged the meeting which is very limiting.