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**Update** iOS 6.1 Causing problems with Exchange (Resolution iOS 6.1.2)

**Update** - Apple has released iOS 6.1.2 which apparently resolves this Exchange Calendar Issue (http://support.apple.com/kb/DL1639).

 

In case you haven’t read any blogs or forums about this issue I wanted to communication our KB article that discusses the problem. Basically we are seeing problems around devices that have been upgraded to iOS 6.1 causing transaction log growth, CPU usage, and Memory consumption problems on CAS & MBX servers.

If you notice excessive IIS log growth on the CAS server you should look for the text below which keeps looping continuously.

2013-02-06 23:41:59 192.168.137.11 POST /Microsoft-Server-ActiveSync/default.eas
[email protected]&DeviceId=ApplDMPFXZABDFHW&DeviceType=iPad&Cmd=Sync&Log=[truncated]
443 [email protected] 192.168.137.246 Apple-iPad2C1/1002.141 200 0 0 187

2013-02-06 23:41:59 192.168.137.11 POST
/Microsoft-Server-ActiveSync/default.eas [email protected]&

DeviceId=ApplDMPFXZABDFHW&DeviceType=iPad&Cmd=MeetingResponse&Log=[...Error:WrongObjectTypeException…]

443 [email protected] 192.168.137.246 Apple-iPad2C1/1002.141 200 00 140

Also if you have enabled EAS Mailbox logging you might see the text below (Status 4) in some meeting requests that suggest the problem is happening.

Workaround

The workaround can include recreating the device partnership, custom throttling policy, ABQ policy, and possible other Load Balancer rules. Take a look are the link below which gives all the details and also different ways to collect logs.

http://support.microsoft.com/kb/2814847

Read the original blog entry...

More Stories By Richard Schwendiman

My name is Richard Schwendiman and I am currently working for Microsoft as a (PFE) Premier Field Engineer specializing in both Exchange and Lync. I have been working as an IT Consultant for 13+ years focusing on a wide array of Infrastructure technologies. These technologies include Messaging, UC, Networking, Platforms, Active Directory, Virtualization, etc... I am currently certified as an MCSE (Microsoft Certified Systems Engineer), MCSE Messaging 2013, MCSE Communications 2013, MCSA 2012, MCITP Enterprise Messaging, MCTS-Lync, CCNA (Cisco Certified Network Associate), Commvault, CCNP (Cisco Certified Network Professional), and JNCIA-ER (Juniper Enterprise Routing). I am hoping that through this blog I can bring knowledge from the field and keep everyone informed about our ever changing Industry. Please feel free to email me any questions, comments, or concerns pertaining to this blog or any technology related things. Thanks and look forward to providing some good content. http://blogs.technet.com/b/rischwen/

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