Meeting organizer receives multiple responses from an attendee

Symptoms
The organizer of a meeting receives multiple meeting responses from an attendee. An analysis of the IIS logs shows multiple MeetingResponse commands from the user's device. These commands resemble the following:
2015-11-18 13:48:57 10.0.1.161 POST /Microsoft-Server-ActiveSync/Proxy/default.eas User=jmartin@contoso.com&DeviceId=VBHDCRCR131BJBUID1MNRQNNIG&DeviceType=iPhone&Cmd=MeetingResponse&Log=PrxFrom:10.0.1.161_V160_Ver1:160_HH:eas.contoso.com_SmtpAdrs:jmartin%40contoso.com_Fet:6014_Pk:4016830080_DevOS:iOS+9.2+13C71_As:AllowedG_Mbx:CLT-E16-MBX1.contoso.com_Throttle:0
Cause
The attendee responded to an instance of a recurring meeting using an iOS 9.x device. The device does not correctly parse the Exchange server response and will continue to send the meeting response.
Resolution
Apply the iOS 9.3 update. Apple has documented the issue in the following article in the Apple Knowledge Base:
More information
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You can use the following Log Parser Studio query to identify users who are affected by this issue:
/* Query to find MeetingResponse commands by user device */SELECT COUNT(*) As Hits,EXTRACT_VALUE(cs-uri-query,'DeviceType') AS DeviceType,EXTRACT_VALUE(cs-uri-query,'DeviceId') AS DeviceId,REPLACE_STR(TO_STRING(EXTRACT_PREFIX(EXTRACT_SUFFIX(cs-uri-query, 0, '_SmtpAdrs:'), 0, '_')), '%40', '@') As User,EXTRACT_VALUE(cs-uri-query,'Cmd') AS CmdFROM '[LOGFILEPATH]' WHERE cs-uri-stem LIKE '%Active%' AND Cmd LIKE '%MeetingResponse%'GROUP BY DeviceType,DeviceId,Cmd,UserORDER BY Hits DESC



Properties

Article ID: 3108212 - Last Review: 04/07/2016 16:29:00 - Revision: 13.0

Microsoft Exchange Online, Exchange Server 2016 Enterprise Edition, Exchange Server 2016 Standard Edition

  • o365022013 o365 o365a o365e kb3rdparty KB3108212
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