Exchange ActiveSync fails on iPhone after upgrade to iOS4

Written by Sam McGeown
Published on 2/7/2010 - Read in about 1 min (132 words)

I’ve spent a fair bit of time today trying to sort out my iPhone sync to my Exchange Server, failing miserably. It used to work, pre-upgrade to iOS4, but for some reason fails to sync.

Symptoms were:


The server was configured as per to allow OWA/ActiveSync with SSL on OWA.

The iPhone was configured to accept the SSL certificate on the Exchange Server.

My brother Tom sent me this Apple KB ( which he’d found from the other side – Exchange servers he was managing were under very heavy load, which is another symptom of this issue.

I installed the new configuration as per the article, restarted the phone and the issue was fixed!

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