1. Kevin  January 27, 2011

    Thanks a bunch, had a user with this issue and was about to rebuild his mailbox. This saved me some time!

  2. Mike  March 4, 2011

    I was wondering if you could explain your process denoted by the link to AT&T. As that link is no longer valid.

  3. Jim  April 8, 2011

    I’ve run into this a few times. I suspected it had something to do with a meeting request but I’m not versed enough in IIS logs to sift through the massively inflated logs and figure out exactly what item caused the ActiveSync jam. Thanks for your insight here.

    Have you attempted to reproduce the problem to figure out under what circumstances the meeting request fails to sync?

  4. danisrael  April 8, 2011


    As far as I can tell, this is corruption that occurs through a non-repeatable parameter. It may have to do with traveling – as the individuals it has affected most, always seems to have sync issues when they return to the office. But nothing I’ve pinned down yet…

  5. Aamir  May 20, 2011

    Hi experts,

    My problem is somewhat strange..!!!

    I configure exchange mail, sync my emails, calendars, and then completely switch off ALL radios, like 3G, WiFi, and services like location services, push etc but it still drains the battery (100% to 20% in less that 2 hours) and becomes very hot even if i don’t use it.

    Not only that, when this problem starts, I can’t even delete any of my SMSs if I want to; the delete option just flashes 🙂 🙂

    Any idea what could be the problem; i apprciate if someone can help.


    PS: If i remove the exchange account, my phone becomes normal.

    • danisrael  May 20, 2011

      If you hadn’t put that PS, I would have said you have an iPhone problem. But given removing the Exchange account removes the problem…this has to be a corruption in the Exchange Data. My advice would be to load the Exchange data 1/3 at a time. Try Mail only. Then try contacts. Then enable calendar. Also, under settings only snyc the smallest amount.

      My guess is the phone is trying to process something internally…like a calendar event or reminder that is corrupt. Otherwise, putting the iPhone into Airplane Mode would not drain the battery.

      And just to be clear… does the screen shut off or does it stay on continuously when the Exchange account is enabled.

      If that doesn’t point you in the right direction…create a dummy account in exchange (or talk to your Exchange Admin) and sync to it. See if it exhibits the same behavior.

  6. Aamir  May 23, 2011

    Hi Danisrael,

    Thanks for your reply and suggestions.

    The screen during this issue works fine but response is a bit slower than usual; in addition to battery draining the only unusal events i observe are:

    1. I can’t delete any SMS; the “delete” option goes off in a flash.
    2. iPhone becomes hot even if i don’t use it.

    I will try your suggestions and keep you posted.

    Thanks again,

  7. Aamir  May 23, 2011

    Hi Dan,

    BTW, earlier when i didn’t R&D on this issue myself, Apple replaced my iPhone 5 times in 4 months becuase i eventually used to restore it from the previous backup 🙂 :).

    Later i came up with this idea of making changes slowly; i mean adding stuff one by one and keep a record of them.

    That was just FYI, how generous they were on replacements 🙂


  8. carl  August 7, 2011

    Great site. I am veiwing it on my iphone and it looks good. Some very interesting comments. Keep up the great posts.

  9. John  October 27, 2011

    Thanks for the posts.
    Reachieved my new iPhone 4s last week and used a previous backup to set everything up.
    Immediately noticed that the battery level was decreasing at an alarming rate (dead after just 5 hrs). Also noticed that some calendar notifications would flicker, like it was being updated repeatedly.

    Went to the Genius Bar in hopes that could determine what process was out of control. They were of little help, giving me a replacement iPhone to try and also suggesting I not restore from backup but instead set everything up manually. Tried this, setting up only my Outlook Exchange and loading a handful of apps. Still had the problem.

    Because of the flickering notification event, next disable calendar and reminder sync, only getting mail from Exchange. Battery life returned to normal. So searched web for Exchange and battery problems and found this site.
    So went to Outlook, deleted calendar related emails and events from both Inbox and Calendar, especially repeating calendar events.
    Turned on calendar and reminder sync again and problem with battery life and the flickering notification events are gone.

  10. Chuck  January 7, 2012

    Life saving post! I was at wits end with both my iPhone and iPad and this saved the day. I am sure it will come up for others on our servers, so it is great to have this solution in hand. Thanks!

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