iOS7 won't connect to Exchange 2010

[AngryTechnician]

Since staff have started upgrading to iOS7 I've been getting a steady stream of reports that email from our on-premises Exchange is not coming through to their phone any more.

 

I've seen the problem first hand and the symptom immediately after upgrade is that it simply fails silently - no new mail comes through and if you try to send it just sits unsent without popping up an error. If I remove the account and re-add it, the credentials pass validation when entered but any attempt to check mail results in a vague error message about not being able to connect to the server. This happens on wifi and 3G, so not wireless related, and other EAS clients are working fine.

 

There's a thread on the Apple forums here: https://discussions.apple.com/thread/5322387. Appears to be lots of conflicting information on it, so before I start throwing supposed solutions at my server I was wondering if anyone else has been dealing with similar issues?

 

Exchange server is currently on 2010 SP2, update rollup 7.

Edited September 25, 2013 by AngryTechnician

[sukh]

There's always issues with IOS. What I'd recommend first is to put on SP3 + Latest RU, then check.

If it still fails then check via Exch RCA.

If it still fails, check AS logs and IIS too.