Iphone 3G slows exchange to a crawl and does not sync calendar

Posted on 2010-08-16
Last Modified: 2012-05-10
Hello, we have SBS 2008.

About three months ago the Dr's Iphone stopped syncing calendar items and the server got extremely slow. I re-loaded the server and applied all updates and Exchange service packs. Everything works great. However when his phone is set to sync everything gets extremely slow, store.exe uses about 27+ percent of the CPU and his calendar still does not sync to the phone. He has a large amount of recurring and appointments in general. On the iphone we have installed the newest 4.0.1 OS and also tried this patch

So I am out of ideas. Apple is out of ideas and says its Exchange. Exchange troublehshooting tools report an extremely high RPC load from his phone. When it tries to sync.
Question by:borgmember
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Expert Comment

ID: 33450477
Ugh. phones + exchange = always fun.
What version of exchange? 2010 does a lot better with this than 2003 (or even 2007);
How big of an operation is this? How many users on the server?
Has this doc had other phones in the past? The biggest calendar/sync issue I see is with recurring appointments where the end date is messed up - i.e. "recur until" - each device keeps it a different way. Exchange has "no end", but some phones have had stuff like 1/1/3500...
This sounds more like legitimate thrashing, though...

Accepted Solution

briandunkle earned 500 total points
ID: 33450491
There's also the rather obvious suggestion of cleaning out his mail and calendar of old stuff...I work with doctors, though, so I know how that goes. :)
If his mailbox is huge, though, and it's primarily the phone that's struggling, it really might be time to get a new phone...3GS if not 4. There will indeed be a ton of traffic and effort to sync a full version of a large mailbox.

Author Comment

ID: 33573405
He opted for the new phone. I will know something in the next few days. I will keep everyone updated. Thanks

Author Comment

ID: 33963827
He got the new phone and it has the same issue. He is going to stop using the phone to sync the calendar and carry his laptop. Thanks

Author Closing Comment

ID: 33963829
See last post.

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