[SOLVED] :iCal Event not added into organizer calendar

:iCal Event not added into organizer calendar

I am creating ics file with 2 attendee and a organizer.

Event is properly creating for both attendees and response is also received when they accept/reject the event. I am sending same invite to organizer as well. On organizer end, event is not adding into their calendar (accept/reject buttons are grayed out). Following two messages are showing:

At the meeting organizer, you do not need to respond to the meeting.
Meeting cannot be found in the Calendar.

How I can change the event so that it also create in organizer calendar?

BEGIN:VCALENDAR
PRODID:-//Appointment Confirmation Event//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:REQUEST
BEGIN:VEVENT
DTSTART:20200506T190000Z
DTEND:20200506T200000Z
DTSTAMP:20200506T190000Z
ORGANIZER:mailto:test1@test.com
UID:Interview_47461@sterlinghoffman.com
ATTENDEE;PARTSTAT=NEEDS-ACTION;ROLE=REQ_PARTICIPANT;RSVP=TRUE:mailto:test2@test.com
ATTENDEE;PARTSTAT=NEEDS-ACTION;ROLE=REQ_PARTICIPANT;RSVP=TRUE:mailto:test3@test.com
X-MICROSOFT-CDO-OWNERAPPTID:-486846808
CREATED:20200504T130737Z
DESCRIPTION:
LOCATION:at 3423 
SEQUENCE:0
SUMMARY:Phone Meeting
TRANSP:OPAQUE
END:VEVENT
END:VCALENDAR

I tried with adding organizer as attendee but it not works.

ATTENDEE;PARTSTAT=ACCEPTED;ROLE=CHAIR;RSVP=TRUE;mailto:test1@test.com

Solution

Since it sounds like the ics file is not being generated by the organisers outlook calendar, then two possible solutions suggest themselves:

1) On the assumption that it would be redundant / duplication to add an event to organisers calendar (who would be assumed by the application to have already created the event in itself) possibly the more robust solution for across calendar applications: add a sent-by, as per https://icalendar.org/iCalendar-RFC-5545/3-8-4-3-organizer.html

ORGANIZER;SENT-BY="mailto:jane_doe@example.com":
  mailto:jsmith@example.com

2) This might be an outlook bug. A quick search come up with same error messages https://developermessaging.azurewebsites.net/2011/09/30/accepting-ical-appts-in-outlook-when-you-are-the-organiser/ and indicates a hotfix. See also How can I add an ICS meeting automatically to the Organizer's calendar?