Can not accept invitation using Mac OS calendar client

Question

Hi, All!
I've a problem accepting invitation using Mac Os X 10 Calendar client.
When I create the following event
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Oracle Corporation/CS 7.0.4.16.0//EN
BEGIN:VTIMEZONE
TZID:Europe/Moscow
X-LIC-LOCATION:Europe/Moscow
BEGIN:STANDARD
TZOFFSETFROM:+0300
TZOFFSETTO:+0300
TZNAME:MSK
DTSTART:19700101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
UID:3eed832a-ae56-46d0-aff1-815d9fca9782
DTSTAMP:20141219T110621Z
SUMMARY:Lunch
DTSTART;TZID=Europe/Moscow:20141219T140000
DTEND;TZID=Europe/Moscow:20141219T150000
CREATED:20141219T110622Z
LAST-MODIFIED:20141219T110622Z
ORGANIZER;PARTSTAT=ACCEPTED;ROLE=CHAIR;RSVP=TRUE:mailto:[email protected]
ATTENDEE;CN=test1 tes2;PARTSTAT=NEEDS-ACTION;ROLE=REQ-PARTICIPANT;RSVP=TR
UE:mailto:[email protected]
X-APPLE-NEEDS-REPLY:TRUE
END:VEVENT
END:VCALENDAR
accepting it cause server 409 status error. Using packet analysis I  discover the error reason.
Client try to put the component below
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Apple Inc.//Mac OS X 10.10.1//EN
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:Europe/Moscow
BEGIN:DAYLIGHT
TZOFFSETFROM:+0300
RRULE:FREQ=YEARLY;UNTIL=20100327T230000Z;BYMONTH=3;BYDAY=-1SU
DTSTART:19930328T020000
TZNAME:GMT+3
TZOFFSETTO:+0400
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0300
DTSTART:20110327T020000
TZNAME:GMT+3
TZOFFSETTO:+0400
RDATE:20110327T020000
END:STANDARD
BEGIN:STANDARD
TZOFFSETFROM:+0400
DTSTART:20141026T020000
TZNAME:GMT+3
TZOFFSETTO:+0300
RDATE:20141026T020000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
CREATED:20141219T110622Z
UID:3eed832a-ae56-46d0-aff1-815d9fca9782
DTEND;TZID=Europe/Moscow:20141219T150000
TRANSP:OPAQUE
ATTENDEE;CUTYPE=INDIVIDUAL;PARTSTAT=ACCEPTED;ROLE=CHAIR;RSVP=TRUE:mailto
:[email protected]
ATTENDEE;CN="test1 tes2";CUTYPE=INDIVIDUAL;PARTSTAT=ACCEPTED;ROLE=REQ-PA
RTICIPANT:mailto:[email protected]
SUMMARY:Lunch
DTSTART;TZID=Europe/Moscow:20141219T140000
DTSTAMP:20141219T110621Z
ORGANIZER:mailto:[email protected]
LAST-MODIFIED:20141219T110622Z
SEQUENCE:0
END:VEVENT
END:VCALENDAR
where not only change the status for "test1 test2" user, but  also add ATTENDEE entry for ORGANIZER!!
The answer of server is clear
trying to change another attendees: ATTENDEE;CUTYPE=INDIVIDUAL;PARTSTAT=ACCEPTED;ROLE=CHAIR;RSVP=TRUE:mailto:[email protected]
So, is there any possibility to work around the issue?

Answer 1

Currently we are not aware of any workaround for this issue. One previous report of this issue - with iCalendar 8 (Yosemite) - showed that the Calendar Server was correctly processing the event.  Given that the only thing that changed was the client software, it is recommended to open a support ticket with Apple to report this issue.
-Deb
If you have any issues or require more assistance with the suggested resolution, please open a Service Request via MOS.
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