I have been fighting the performance issues since last Friday. The first sign of the issue was 2 days after iOS4 was released. Then all hell broke loose the day after iPhone 4 was released. I highly recommend this patch, especially if you're still running Exchange 2003. The issues/warnings/errors that you see on 2003 will make it look like you have database corruption (high store.exe CPU usage on the backend, failed message delivery, etc). This is not the case of course.
It doesn't appear any Exchange version is immune to the issues it causes. -----Original Message----- From: Dahl, Peter [mailto:peter.d...@yum.com] Sent: Thursday, July 01, 2010 7:55 AM To: MS-Exchange Admin Issues Subject: FW: iPhone4 and Exchange problem FYI FYI: I have not seen or heard of this affecting anyone at our company but just in case any of you have been impacted check out the Apple article and fix mentioned in the original message. -----Original Message----- From: Susan Bradley Sent: Wednesday, June 30, 2010 3:32 PM To: Patch Management Mailing List Subject: iPhone4 and Exchange problem FYI Forwarded courtesy of Bob Groger Got this email from Intermedia, whose products I resell. Bob G. Apple recently released the iPhone4. It uses a new iPhone operating system ? iOS4 ? that is also available for download on older iPhone devices. The new iPhone operating system is adversely impacting Intermedia customers as well as customers of other email providers. The following notification summarizes these issues and the critical actions we ask that your iPhone4 and iOS4 users immediately take in response. The actions are in support of our commitment to providing the highest service quality for your organization and all Intermedia customers. We will continue to post updates as the situation evolves and Apple provides further details. Summary of Issues Exchange users who use an iPhone4 or upgraded an older iPhone to iOS4 are experiencing difficulties syncing their contacts, mail, and calendar via ActiveSync. Additionally, iOS4 is creating significant artificial load on Exchange servers, resulting in performance slowdowns for users on other devices and mail clients. An Internet search for ?iOS4 Exchange? will provide further information related to these issues, which are affecting all email providers that use the ActiveSync protocol with iPhones. Steps Your Organization Must Take iPhone users who use the iPhone4 or upgraded to iOS4 must install a related Apple configuration patch on their iPhone. The patch, along with installation directions, can be found here: http://support.apple.com/kb/TS3398. Failure to install this patch will result in incomplete sync of user items and may cause performance issues. If your users run an iPhone4 or other iOS4 device without the configuration patch, Intermedia may disable ActiveSync on their device to protect your organization?s overall service quality. Further Technical Details on the Issue and Our Response The iOS4 issues are driving random application pool instability on Exchange 2007 CAS servers. Microsoft confirmed this instability is caused by iOS4 and classified this as a client side issue related to the Apple iOS4 update. Microsoft is not planning to release a patch or update. The instability will manifest itself as connection failures or slow performance when using Outlook and other clients. Outlook Web App (OWA) is not impacted and continues to function normally. If you are having connectivity issues we recommend using OWA to retrieve your mail. Intermedia's engineering and operations teams are mitigating the impact to our customers via close monitoring and automated restarts of the impacted application pools. Thank you for hosting with us, Intermedia "This communication is confidential and may be legally privileged. If you are not the intended recipient, (i) please do not read or disclose to others, (ii) please notify the sender by reply mail, and (iii) please delete this communication from your system. Failure to follow this process may be unlawful. Thank you for your cooperation."
