6

I have Calendar connected to an Exchange 2010 server. I created an event with several (~40) persons. When someone answers I sometimes (not always) have a notification in Calendar with an "OK" button.

If I click "OK" the invitation is sent again to everybody.

I also noticed that sometimes when I snooze an alarm the other invited persons receive a notification per email.

Edit 1

This happens with each and every event that I create on Exchange, not only the example above.

Edit 2

Is there a way to solve the problem? Or is there a way to gather more information (for example logs)?

Edit 3

I just noticed that when clicking on "OK"

enter image description here

Calendar sends an email to the attendees (I found it in the "Sent" folder) with the invitation attached (which makes no sense).

BEGIN:VCALENDAR
METHOD:REQUEST
PRODID:Microsoft Exchange Server 2010
VERSION:2.0
BEGIN:VTIMEZONE
TZID:W. Europe Standard Time
BEGIN:STANDARD
DTSTART:16010101T030000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=10
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:16010101T020000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=3
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
ORGANIZER;CN=:MAILTO:********
ATTENDEE;ROLE=REQ-PARTICIPANT;PARTSTAT=NEEDS-ACTION;RSVP=TRUE;CN=Häubi  J
 ürg A. (ID PPF):MAILTO:********
DESCRIPTION;LANGUAGE=en-US:When: Thursday\, January 29\, 2015 2:00 PM-3:00 
 PM. (UTC+01:00) Amsterdam\, Berlin\, Bern\, Rome\, Stockholm\, Vienna\nWhe
 re: STB H11.1\n\n*~*~*~*~*~*~*~*~*~*\n\n\nORIGINAL TEXT\n
SUMMARY;LANGUAGE=en-US:Archivmigration
DTSTART;TZID=W. Europe Standard Time:20150129T140000
DTEND;TZID=W. Europe Standard Time:20150129T150000
UID:484366B6-E758-4B66-B590-E42D1797C805
CLASS:PUBLIC
PRIORITY:5
DTSTAMP:20150123T152428Z
TRANSP:OPAQUE
STATUS:CONFIRMED
SEQUENCE:1
LOCATION;LANGUAGE=en-US:STB H11.1
X-MICROSOFT-CDO-APPT-SEQUENCE:1
X-MICROSOFT-CDO-OWNERAPPTID:2112993755
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-DISALLOW-COUNTER:FALSE
BEGIN:VALARM
ACTION:DISPLAY
DESCRIPTION:REMINDER
TRIGGER;RELATED=START:-PT15M
END:VALARM
END:VEVENT
END:VCALENDAR

This does not seem to be generated by Calendar (PRODID:Microsoft Exchange Server 2010), it seems that Calendar sends back the confirmation it received.

Edit 4

I am using Calendar 8.0 on Yosemite but the problem was already present on Mavericks before the upgrade.

  • To narrow down the problem a bit, have you found that the responses from specific people always cause this behavior, or does it appear to occur randomly, with random people? An example would be that a response from user A always triggers this behavior, while a response from user B never does. I'm far from being an Exchange expert at all, but finding a correlation between a user 'out there' and an odd behavior can be helpful in troubleshooting. If there is a correlation, it may be a simple setting on the users' configurations. – IconDaemon Jul 31 '14 at 13:28
  • It's not user related. Happens with random persons. – Matteo Jul 31 '14 at 13:38
  • Oh, well. it was worth a shot. Hope you figure it out. – IconDaemon Jul 31 '14 at 14:22
  • Could you check if the Respond was send from iPhone user. – Ruskes Jan 27 '15 at 4:09
  • @Buscar웃 No iPhone involved (I am using OS X and the other users mostly Outlook on Windows). But this is not relevant: Calendar should not send another invitation when clicking on "OK". – Matteo Jan 27 '15 at 6:18
1

This is a problem between Microsoft Exchange and your mac. I have had same issue a while ago, and decided not to change stuff via an Apple device.

I know it's not the answer you were hoping for, but's the reality at this moment.

  • Not using OS X is as you said not a solution. Also not using the calendar ... – Matteo Jan 23 '15 at 13:18
  • See the edit: the problem is that Calendar sends an email it should not send. After clicking "OK" it sends an invitation again. Exchange is not even involved. – Matteo Jan 27 '15 at 15:39
0

Heres a long shot in the Calendar.app prefs at the bottom of the Advanced pane, do you have checked:

Ask before sending changes to events

enter image description here

From what I understand this prevents messages being sent other people when you make changes. It may include invitations

  • It was checked. It only asks when I actively change something. – Matteo Jan 26 '15 at 6:50
0

I have this exact problem too. Apple Calendar + Office 365 Exchange = spam all your invitees when you are the organizer of an event and you confirm/snooze a notification of an event.

I've stopped using it and rely only on Outlook for Mac instead.

0

It seems that it was a bug and that it will be fixed with OS X 10.11.0 and iOS 9.

Since the first public beta (on both iOS and OS X) the problem disappeared (without any change on my side).

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