Apple posts article on how to fix iOS 4 Exchange sync problems

iphone 4 multiple exchange accounts

Apple has posted a knowledge base article support note for users whose Exchange ActiveSync mail, contacts, and calendars are no longer syncing post-iOS 4 update.

Here are the symptoms as described by Apple:

Immediately after updating to iOS 4, some users may notice that Exchange ActiveSync Mail, Contacts, or Calendars do not sync, or sync very slowly. In addition, some Exchange Server administrators may notice their servers running slowly.

And the solution:

To work around this issue, users should install a configuration profile from Apple that increases the amount of time the iOS 4 device will wait for the Exchange Server to respond to its sync requests. For best results, the profile should be installed on as many iOS 4 devices at your company as possible.

To install the profile:

  1. Use Safari on your iOS 4 device to download the configuration profile. It may be easiest to read this article with your iPhone or iPod touch and tap the download link there, but you may also email the attachment to another email account on your iOS 4 device, and tap the attachment to open it.
  2. Tap Install to install the profile, and enter your passcode if prompted.
  3. A warning message will appear because the profile is not signed. Tap Install Now. Tap Done to complete the installation, then power off your device and power it back on.
  4. Wait for your Exchange data to finish syncing.

After installation, the profile will be listed under Settings > General > Profile.

If you've been having Exchange sync issues under iOS 4, let us know if this does indeed resolve it for you.

[, thanks Doug!]

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Rene Ritchie

EiC of iMore, EP of Mobile Nations, Apple analyst, co-host of Debug, Iterate, Vector, Review, and MacBreak Weekly podcasts. Cook, grappler, photon wrangler. Follow him on Twitter and Google+.

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Reader comments

Apple posts article on how to fix iOS 4 Exchange sync problems


Wow. Run out and fix every phone in the company. Go ahead, we'll wait. In the mean time our phones will keep rapidly disconnecting and reconnecting and DOSing your servers.
Apple fix your OS. Not all companies or service companies have access to user phones.

Had many issues with it since i updated to iOS 4. This works perfect. (Y) Contacts, Mail, Calendar. ActiveSync is working at its best again.

Safari on my 3GS loads the page with the profile, but I CANNOT tap on it to have it installed... :( What can be the problem?

that was the same for me. I went to the website on my desktop. downloaded the file and then attached it to an email to myself. I could then open it from the email and install it.
However don't think it actually made any difference. My google sync exchange account is still downloading emails with "No Sender" and "No Subject" only to replace them with the correct information sometimes hours later.

Furthermore, why do they recommend opening in iphone safari but don't bother optimizing the page for the iphone, needing to zoom in to read anything.
And why is it unsigned. Surely if anyone is able to offer a signed profile update its Apple?

Hey guys does any one know if this fixes the hotmail issue with microsoft exchange? can we use hotmail on the mail app now?

you know guys usually I am a huge dick.. But I am sorry about all the phone issues so far.. We f-ed up man... We f-ed up.. Free turtlenecks for all ios4 users on me steve
written on my galaxy pro

@Varun: Go to the link at the bottom of the article..
I have no problems with my Gmail Sync and Exchange accounts. Maybe it helped that I didn't restore my previous iOS3 backup but set iOS4 up as a new phone and then restored my SMS database file and manually re-configured my email accounts.

This fix does not work. I still get an error message. The thing is, I can't tell if the error message is a true error, or if it's some other weird bug, because I still do get email/cal/contact syncing. I have four exchange accounts set up, one which syncs mail/cal/contacts, the other three which primarily sync mail. I still get the bug after applying this "fix". Apparently Apple spent all their time entranced by the "magic" of the phone and didn't actually dare to test it.

Intermedia, a major hosted Exchange provider, is disabling ActiveSync for iOS4 users because of this issue!

No fix for Exchange server for me? I have Ipad which works fine with my work Exchange server,ie contacts diary etc. however I try configure my iphone4 with exact same details in every way wont work?????? getting annoyed. Can anyone helppppppppppp

Article and link to profile was sent to me by my hosted exchange provider (Apps4rent).Worked for me. No longer get any error messages and Exchange works.

This fixed our issue. We had major slowdowns on our Exchange server from just ONE of our iPhones with this issue. Put the patch in, rebooted the phone, and all the errors went away, and the server was back to normal.
I feel sorry for the larger companies that may have hundreds of iPhones out, and they have to manually patch each one. Ouch Apple.....

It seems running this Config Profile has resolved the issues we have had within our environment with the early iOS 4 uograders.
We are a Large Australian company with 500 iPhone users.  Currently we have about 75 users that have upgraded at home (internal iTunes packages has not been upgraded yet) now our WAN preformance at our BE Exchange Servers sites has suffered due to this issue.  Have to disable ActiveSync until we apply this Config Profile.
I created a link which I SMS to each user who has upgraded.  You are welcome to use it if you link.
I hope Apple add this in its next firmware upgrade.

Tried that, still have same issues with "connecting" running and running and running.... with nothing syncing. 3Gs.

Is this a problem on all iOS phones or just 3gs and 4 models? I have iOS 4 on my 3G and although it's now the slowest piece of crap I own, I've not had any Exchange problems to note.

Is this problem only for 3g and 3gs models that upgraded? I have the iphone 4 and haven't noticed any problems (now that I said it, it probably is going to go nuts now).

I was getting "cannot connect to server" messages after I installed IOS4 on a 3GS. I emailed the file to myself on the Phone and installed it - had to retype the domain name and reset the SSL setting but it worked - all my mail and folders came flooding back. I am still fetching data manually tho -works ok for me but maybe not the setting others would want.

I have installed the patch and the (new) profile setting is availabe in read only in my settigs. But I still do not recieve any sender information after doing a successfull sync with my updated 3GS.

I attempted to use the profile config with the extended timeout on an iPhone 3gS OS 4.1 and the exchange calendar still will not sync. Even at 2weeks. The sync starts, after 15 seconds, stops, then immediately starts again, goes for about another 45-60 seconds then stops completely. No Calendar items what so ever.
Other ideas??? The iPad still works correctly...

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