ical4j: add organizer who is able to cancel an event?

Question

I am using ical4j to send out emails with a calendar attachment. I am able to add an organizer based on this SO post: How should I use iCal4j to add a meeting organizer to an iCal event

event.getProperties().add(new Organizer("mailto:bob@example.com"));

The problem is that no attendees added to the calendar is able to cancel an event. If I create (manually, no ical4j) an calendar appointment in Outlook Online, I am able to cancel an event as shown below:

However, the email with an ical4j attachment I received as the organizer (see the above code example) only gives me three options: Yes, No, Maybe as shown below:

How can I make someone among an meeting's attendees be able to cancel the meeting?

------- Update 11/15 ------- Based on the suggestion from @fortuna, my program generated the following event. I am still unable to cancel an event.

BEGIN:VCALENDAR
PRODID:-//Events Calendar//iCal4j 3.0.1//EN
CALSCALE:GREGORIAN
METHOD:REQUEST
BEGIN:VEVENT
DTSTAMP:20211115T144506Z
DTSTART;TZID=America/New_York:20211215T110000
DTEND;TZID=America/New_York:20211215T114500
SUMMARY:ABC123 School
TZID:America/New_York
LOCATION:Virtual
UID:153ab747-bbd2-4964-9112-9fa0d29ed306
STATUS:CONFIRMED
ORGANIZER;ROLE=CHAIR:mailto:dev1@example.com
ATTENDEE;ROLE=REQ-PARTICIPANT:mailto:dev2@example.com
ATTENDEE;ROLE=REQ-PARTICIPANT:mailto:dev1@gmail.com
END:VEVENT
END:VCALENDAR

I manually generated an event in Outlook Online and forwarded it to my yahoo account to get the calendar attachment:

BEGIN:VCALENDAR
METHOD:REQUEST
PRODID:Microsoft Exchange Server 2010
VERSION:2.0
BEGIN:VTIMEZONE
TZID:Eastern Standard Time
BEGIN:STANDARD
DTSTART:16010101T020000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=11
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:16010101T020000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=2SU;BYMONTH=3
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
ORGANIZER;CN="dev1":mailto:dev1@example.com
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN=dev2
 g:mailto:dev2@yahoo.com
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN="dev3"
 :mailto:dev3@example.com
DESCRIPTION;LANGUAGE=en-US:\n\n\n________________________________________\n
 From: dev1 <dev1@example.com>\nSent: Monday\, November 15\, 2021 8:5
 2:23 AM (UTC-05:00) Eastern Time (US & Canada)\nTo: dev3\; dev1\, 
 \nSubject: test\, please ignore it.\nWhen: Monday\, N
 ovember 22\, 2021 10:30 AM-11:00 AM.\nWhere:\n\ntest\n\n__________________
 ______________________________________________________________\nMicrosoft 
 Teams meeting\nJoin on your computer or mobile app\nClick here to join the
 .....
 cdd5fc5d11c&threadId=19_meeting_OGYzZjAdddxMjYtYYy00ZDE4LWE0NjctZjY4OTA0ZG
 I0ZTQ4@thread.v2&messageId=0&language=en-US>\n____________________________
 ____________________________________________________\n
UID:040000008200E00074C5B7101A82E00800000000933C540328DAD701000000000000000
 0100000001771BBC5CAD45B499CBF167EE077185B
SUMMARY;LANGUAGE=en-US:FW: another test for GRD\, please ignore it.
DTSTART;TZID=Eastern Standard Time:20211122T103000
DTEND;TZID=Eastern Standard Time:20211122T110000
CLASS:PUBLIC
PRIORITY:5
DTSTAMP:20211115T135223Z
TRANSP:OPAQUE
STATUS:CONFIRMED
SEQUENCE:0
LOCATION;LANGUAGE=en-US:
X-MICROSOFT-CDO-APPT-SEQUENCE:0
X-MICROSOFT-CDO-OWNERAPPTID:2119924365
X-MICROSOFT-CDO-BUSYSTATUS:TENTATIVE
X-MICROSOFT-CDO-INTENDEDSTATUS:BUSY
X-MICROSOFT-CDO-ALLDAYEVENT:FALSE
X-MICROSOFT-CDO-IMPORTANCE:1
X-MICROSOFT-CDO-INSTTYPE:0
X-MICROSOFT-ONLINEMEETINGINFORMATION:{"OnlineMeetingChannelId":null\,"Onlin
 eMeetingProvider":3}
X-MICROSOFT-ONLINEMEETINGTOLLNUMBER:+1 571-429-6038
X-MICROSOFT-ONLINEMEETINGCONFERENCEID:475654328
X-MICROSOFT-SKYPETEAMSMEETINGURL:https://teams.microsoft.com/l/meetup-join/
 19%3ameeting_OGYzZjAxMjYtYzFlYy00ZDE4LWE0NjctZjY4OTA0ZGI0ZTQ4%40thread.v2/
 0?context=%7b%22Tid%22%3a989b5e2ddda-14e4-4efe-93b7-8cdd5fc5d11c%22%2c%22O
 id%22%3a%2256f6a1be-b722-47fd-b69c-5950f281818f%22%7d
X-MICROSOFT-SCHEDULINGSERVICEUPDATEURL:https://api.scheduler.teams.microsof
 t.com/teams/989b5e2a-14e4-4efe-9ddd5fsasdfc5d11c/56f6a1be-b722-47fd-b69c-5
 950f281818f/19_meeting_OGYzZjddYtYzFl4Ysa00ZDE4LWE0NjctZjY4OTA0ZGI0ZTQ4@th
 read.v2/0
X-MICROSOFT-SKYPETEAMSPROPERTIES:{"cid":"19:meeting_OGYzZjAxMjYtYzFlYy00ZDE
 4LWE0NjctZjY4OTA0ZGI0ZTQ4@thread.v2"\,"rid":0\,"mid":0\,"uid":null\,"priva
 te":true\,"type":0}
X-MICROSOFT-ONLINEMEETINGCONFLINK:conf:sip:dev1@example.com\;gruu\;opaque=app:
 conf:focus:id:teams:2:0!19:meeting_OGYzZxAxMjYtdasYzFlYy00Z4LWE0NjctZjY4OTA
 0ZGI0ZTQ4-thread.v2!56f6a1beb72247fdb69c5818dasdfsadf!989b5e2a14e44efe93b78
 cdd5fc5d11c
X-MICROSOFT-DONOTFORWARDMEETING:FALSE
X-MICROSOFT-DISALLOW-COUNTER:FALSE
X-MICROSOFT-LOCATIONS:[]
BEGIN:VALARM
DESCRIPTION:REMINDER
TRIGGER;RELATED=START:-PT15M
ACTION:DISPLAY
END:VALARM
END:VEVENT
END:VCALENDAR

score 0 · Answer 1 · answered Nov 13 '21 at 00:08

0

I suspect you may need to add something like a participation role to your organizer property:

https://datatracker.ietf.org/doc/html/rfc5545#section-3.2.16

e.g. ORGANIZER;ROLE=CHAIR:bob@example.com

Another way to find out how Outlook does it is to forward the event "as icalendar" to another email address and inspect the ".ics" attachment.

answered Nov 13 '21 at 00:08

fortuna

701
5
7

thanks so much for your help! I updated my post with the tests based on your suggestion. – curious1 Nov 15 '21 at 15:05
Just to confirm, only the organizer should be able to cancel an event, other attendees won't have that ability. So when you test you should set the organizer to a real email address. – fortuna Nov 16 '21 at 21:19
Yes, only the organizer should be able to cancel an event. The email addresses used in my tests are real email addresses. – curious1 Nov 17 '21 at 03:29

ical4j: add organizer who is able to cancel an event?

1 Answers1