Hi,
Bit of an odd issue but I'll try to keep it simple.
We have a working 2013 Exchange environment and use Application Request Routing (ARR) as a Reverse Proxy for external users to access ActiveSync (among other services). So far everything works fine but when I added an HTTP Redirect rule on the root of the ARR server to help users get to the /rdweb sub folder, ActiveSync stops working from the iPhone 6 devices.
If I use the MS Connectivity Analyzer to check ActiveSync it reports Success so I'm wondering if the iPhone 6 implementation of ActiveSync might be causing the problem?
If I disable the HTTP Redirect rule, the iPhones start to work perfectly!
Cheers for now
Russell