iPhone OS4 and Exchange Active Sync problem

Question since the release of the iPhone OS4 for iPhone 3G, iPhone 4, iPhone 3G and newer iPod touch in our technical support centers more clients with problems in using Exchange Active Sync (EAS). In addition to problems such as slow or no striking synchronization from the terminal itself to report and Exchange administrators to observe an increased load on their server systems, since mobile devices connect with the new software version from Apple itself. We have worked with Apple together to research the cause to the problem as quickly as possible to allow for recovery. Apple has for the support article iOS 4: Exchange Mail, Contacts, Calendars or may not sync after update published.

According to affected users of the device itself, a new configuration profile downloaded or sent as an email, so the file can be opened as an annex that. Then, the shape must be installed. After the next synchronization with the Exchange server, the device should function normally again. Apple is working on a fix according to own data, with the date of publication was not yet known.

The new profile reduces the time-out of Exchange ActiveSync connection to four minutes. This value should normally be sufficiently long. Who wants around him but a longer time-out, can open a text editor, the XML file, find the number 240.0, and then increase this value accordingly.

Administrators of Exchange servers that use the user should iOS 4, (can) provide all equipment with the new profile. Otherwise, wait for those not on a time-out, but also generate new read more compounds against the Client Access Server (CAS), which in turn can lead to above average number of accesses to the mailbox server, and therefore high system load. Just servers that have already a high base load and where mailboxes are located, in which many elements are in the main folders (Inbox, Contacts, Calendar, etc.), thereby possibly can go to their knees.

To find out which devices with which OS version you combine Apple, you can ActiveSyncDeviceStatistics cmdlet Get-Mailbox to use that. Devices with iOS4 than "device user agent" to "801 293":

• Apple-iPhone1C2/801.293 = iPhone 3G iOS 4.0
• Apple-iPhone2C1/801.293 = 3G iPhone with 4.0 iOS
• IPhone Apple-iPhone3C1/801.293 = 4 with 4.0 iOS
• Apple-iPod2C1/801.293 = iPod Touch 2G with 4.0 iOS
• Apple-iPod3C1/801.293 = iPod Touch 4.0 3G iOS

A drop of bitterness on the edge: Unfortunately, the profile is not digitally signed, which results in a warning message on the mobile device, to be ignored according to the manufacturer's instructions by the user. I believe that the training of users to ignore such warnings, leading to a desensitization on security issues. A small but unsightly flaw.

The same problems encountered with the synchronization with Google Apps, which use the Exchange ActiveSync protocol, had other causes. That the many resynchronization devices updated after the release of iPhone OS4 Google's servers totally overloaded and thus disturb the Google Sync service resulted. There were, however, allocates resources for the new nonstop service and improvements implemented so that the loss should now be fixed.

Thanks for the note. I've corrected the same time.

So my iPhone 3G running iPhone with OS4 and logs the following:

device user agent: Apple-iPhone/705.18

LastSyncAttemptTime: 07.07.2010 07:36:44

LastSuccessSync: 07.07.2010 07:36:44

This is different to that described above. :blink:

Quote:

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So my iPhone 3G running iPhone with OS4 and logs the following:

device user agent: Apple-iPhone/705.18

LastSyncAttemptTime: 07.07.2010 07:36:44

LastSuccessSync: 07.07.2010 07:36:44

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Sure, that you have upgraded to 4.0 iOS? 705.18, to my knowledge iOS 3.1.3:

• IOS 801 293 = 4.0 (8A293)
• 705.18 iOS = 3.1.3 (7E18)
• IOS 702 367 = 3.2 (7B367)
• 3.0 (7A341)
• 3.0.1 (7A400)
• 3.1 (7C144, 7C145, 7C146)
• 3.1.2 (7D11)