Previous 1 2 Next 27 Replies Latest reply: Apr 25, 2013 10:58 AM by singebad Go to original post
  • mrben09 Level 1 (0 points)

    This a mess, and one of my main suppliers, who has several hundred devices on ios6, has sent me an email detailing that best practice from their support contacts in Apple and Microsoft, is to only use Outlook (on Mac or PC) to manage appointments, until a fix is issued.


    However there has also been instances of cancelled meetings with no intervention on the behalf of the user at all ! This happen to me on Tuesday. Apparently I cancelled a meeting arranged by one of my collegues even though I had accepted the meeting about 4 weeks ago. I am on IOS 6.

  • singebad Level 1 (0 points)

    Yeah, for a while now we have communicated to our users to not perform calendaring functions from their iDevices (view-only) ... so many of them are using Outlook 100% for calendaring, yet the issue still occurs. Using Outlook exclusively may mitigate the issue, but it is not a valid workaround for this issue in my opinion.


    In many of the cases we've seen, no intervention was performed by the user at all. They just happen 'automatically'. The user is not in MS Outlook or on their iDevice. In every case, the users are on iOS 6.



  • vadion Level 1 (0 points)



    Having the same issue here, started roughly a week ago with users on Iphone and IOS6.


    One of our VIP accidentally cancelling a big meeting for a large group. It turned out the VIP has been made an organiser of the meeting. The VIP is pretty cluely and alert and been letting me know of any calendar invites where the VIP been made organiser of. I found an article earlier on to change the meeting back via MFCMAPI.


    However today, we have 2 more users, both are VIPs. I can't be changing calendar meeting back to what it was and they defintely would not be happy to have to pay attention whether they been made an organiser or not.


    Raised a ticket with Apple today, 361 470 198. Been also trying to call one of the account manager we've been talking to with other issues with Idevices (Calendar disappearing, Calendar duplications), but havent been able to get in touch with the person.


    We're on Exchange 2010, SP2, Rollup 4.




  • atlauren Level 1 (0 points)



    I'm chasing a theory that this is actually an iMIP/iTIP issue in Exchange, and not necessarily an iOS issue. 


    We had a similar event occur at my site.  In this case it was between two Exchange installs, on different GALs.  Both orgs are on Exchange, on CAS and Mailbox servers.  The user who sent the cancel was invited via a valid SMTP address that happened to *not* be his windowsemailaddress.


    For the users who issued cancel:


    Are they on the SAME Exchange org and GAL as everyone else?

    Was the invitation sent to their windowsemailaddress? 

    (Or perhaps another proxyaddress?  or a valid Sendmail address that is NOT their windowsemailaddress?)




    higher ed IT guy

  • singebad Level 1 (0 points)



    We are only running one Exchange org here, although we do have co-existence in place to a degree, with E2007 and E2010 in production. No mailboxes reside on the E2007 side at this time.


    At one point, when I was working with MS Support, they mentioned this issue was related to co-existence of Exchange versions, but admitted they were able to reproduce the issue on a single E2010 server deployment.


    The official workarounds for this, per MS TAM:



    NOTE:  These are long standing “best practices” recommendations for Outlook and Calendar best performance.  See

    1. 1.      Update the delegate and manager pair to the same version of Microsoft Outlook.  The version should be Outlook 2007 Service Pack 2 or a later version.
    2. 2.      For Exchange Server 2007 and 2010, enable the Calendar processing on the server per
    3. 3.      For managers, make sure that only the delegate receives the meeting requests and responses.
    4. 4.      In addition, we recommend enabling the Exchange Calendar Repair Assistant (


    To configure this feature, use the following document:

    If it is currently not enabled for all users, and you want to implement for a single user at a time for testing, use the following document:



    Has anyone tried Step 2 or Step 4 above? I'm not sure what the impact of enabling the Exchange Calendar Repair Assistant for our affected mailboxes would be, but intend to perform some testing soon. Has anyone used this?



  • JKMonty Level 1 (0 points)

    I've been troubleshooting this issue as well and have found that in all cases where we have seen this behaviour the user/iphone that sends the cancelleation has been setup via Active Sync and also is configured to sync Mail, Calendar, & Contacts to iCloud.   When turning off iCloud the problem seems to go away. 

  • singebad Level 1 (0 points)

    iOS 6.0.1 available for download!


    Release notes:



  • MindyK Level 1 (10 points)

    Has anyone tested the iOS 6.0.1 update with this issue yet? We had one delegate update her phone and subsequently receive a ton of meeting cancellation notices from Exchange. I don't have details yet on whether the people whose calendars she manages have updated their devices or whether this was a meeting previously affected by the issue.



  • tlpresley Level 1 (0 points)

    The Apple release notes seem grossly understated on exactly what they fixed.  Has anyone seen some specifics?  Not ready to declare victory yet...

  • 0xG Level 1 (0 points)
  • Clif H Level 1 (115 points)

    Looks like that article refers to iOS version 6.0, not the most recent that was supposed to have fixed the organizer swap issue. I never saw that issue so cannot confirm/deny its fix.

  • jaimeking76 Level 1 (0 points)

    was this resolved? we are having a user with the same issue?

  • singebad Level 1 (0 points)

    Yes, this is an iOS 6 bug. Update your device(s).

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