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 âiOS4 Exchangeâ 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:
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 organizationâs 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.