A potential solution: paste the ICS into
https://icalfilter.com/, and add the icalfilter.com link to your Google Calendar. Note Google Calendar can take up to twelve hours to update calendar feed upon changes, so you'd rather use Outlook Calendar directly where necessary.
This solution is based on two assumptions:
- Accepting an emailed invitation adds an event to your Outlook Calendar.
- Google Calendar is not parsing some Outlook Calendar entries correctly, so icalfilter.com corrects the formatting.
