Today seems to be the day for reporting iOS 6.1 related problems. We first reported about the poor iPhone battery life issue and offered some tips, then the 3G issues and now we’re getting reports that it is not playing nice with Microsoft Exchange.
The issue is so bad that ZDNet is reporting some IT administrators are even blocking iOS 6.1 devices from accessing Exchange to mitigate the problem.
It looks like iOS 6.1 devices are causing excessive logging, which is resulting in high CPU utilization on the Exchange servers. A forum user on Microsoft Technet reports:
I had a user upgrade to 6.1 and immediately after he finished, his phone/IPAD started causing excessive logging on the exchange server.
I found the problem by using exmon and saw the CPU utilization in conjunction with high session count.
He shut down Outlook and the problem remained. He Turned OFF his IPAD and the problem went away. The only change he said he made that morning was upgrading to iOS 6.1 [..]
[..] His device caused over 50GB worth of logs for that particular database.
Denny Payne at Dev Central provides some more details about what may be causing the issue and instructions on how to disable iOS 6.1 devices:
we started experenceing issues with Apple iOS 6.1, essentially malformed meetings on a device cause the device to get into a sync loop which causes excessive transaction log growth on the Exchange mailbox servers which will cause Exchange performance issues and potentially transaction log drives to run out of disk space.
Corporate users using Microsoft Exchange have been advised to avoid upgrading to iOS 6.1 as IT administrators have no option but to block iOS 6.1 devices from accessing Exchange server to prevent the issue from causing availability issues. Apple is yet to acknowledge the issue, but like the 3G issue, we expect them to fix it in iOS 6.1.1.
These issues raises an important point for discussion. Should Apple allow users to downgrade to the previous version of iOS instead of stop signing the iOS firmware files for the previous version just to get an upper hand on jailbreakers? Is it really worth inconveniencing the majority of the users? In this case, the user could have downgraded to the previous version, so that he or she could continue to the access mails or be reminded of their appointments on their iOS device.
I would love to hear your thoughts, so feel free to drop me a line in the comments below.