Drag and drop.ics file from where you have saved it to the now open Calendar window.

Resolved when I right clicked on the downloaded file and chose open with and switched to Apple Calendar rather than the default of Outlook.

When receiving the.ics attachment as a download from a web link (i.e.

Dragging the downloaded attachment over to the Outlook 2016 calendar does work, but in doing that you have no idea what date the invitation was for because it just puts it on the calendar instead of creating a new calendar entry that you can see and then click saveclose like on Windows.

The only way I was able to see what date the invite was for, was to also do an Open With for the attachment and force it to also go to the Apple Calendar.

Then, I could search there and find it by the subject name of the event.

Outlook Icalendar Import Mac Showed Nothing

I had to do this as the search in Outlook 2016 Mac showed nothing about that subject).

Then, going back to Outlook 2016 and to the now known date, I could see that it indeed came in to Outlook.

Outlook Icalendar Import How To Control Cookies

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Outlook For Mac Icalendar Import