I just discovered this small, but useful bit of information and thought it worth sharing. Perhaps it could be added to the Exchange 2013 WAF publishing guide?
I've previously been able to get Android and IOS devices configured using Autodiscover, however had a problem with Nokia Lumia devices running Windows phone.
Looking through the logs I can see this attempts to use the following url with an uppercase D.
/AutoDiscover/AutoDiscover.xml
This needs to be added to the URL hardening exceptions for this to work due to the UTM case sensitivity.
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