I've turned on Einstein Activity Capture in a dev environment and connected to an Outlook 365 mailbox.  When I create an Event in Outlook, I see it twice.  It replicates and there is an Event in SF on under My Calendar.  I also have a Calendar named Microsoft Office 365.  I see it there also.  (The formers shows up in a SOQL query result and the later does not.)

I appears that EAC is both giving me a view into my Office 365 calendar AND replicating Events.  That's rather confusing so I'm wondering if it's working correctly of if maybe something should be turned off.

Perhaps that is corrrect and users to select on one of the two calendars to view and work only off that calendar.  But I want to check and see what is the correct way to use the product.