Events in iCal I create show up as tentative when I invite others
When I create new events in my iCal using an Exchange account, they show up hashed/grey (i.e., tentative) if I invite people and they haven't accepted. (This does not occur if I create new events from non-Exchange accounts and invite people who do not accept.) I am using macOS Catalina 10.15.6.
Is there a way to fix this? These meetings are not tentative. I've tried changing settings directly in the web interface for the Exchange account (i.e., "Show As Busy" was already selected) to no avail. There also did not appear to be any relevant settings to change directly in iCal.
This issue vastly limits the utility of iCal for me as many people never accept their invitations even though they join the meetings. Any help appreciated.
MacBook Pro 13″, macOS 10.15