I have isolated my problem to two error messages on my Exchange 2010 server but am unaware of a solution, I played around with the bindings some but am afraid I might break OWA. They are definitely related.
Message 1
WebHost failed to process a request.
Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/8314856
Exception: System.ServiceModel.ServiceActivationException: The service '/EWS/Exchange.asmx' cannot be activated due to an exception during compilation. The exception message is: This collection already contains an address with scheme http. There
can be at most one address per scheme in this collection.
Parameter name: item. ---> System.ArgumentException: This collection already contains an address with scheme http. There can be at most one address per scheme in this collection.
Message 2
WebHost failed to process a request.Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/20145477
Exception: System.ServiceModel.ServiceActivationException: The service '/Autodiscover/Autodiscover.xml' cannot be activated due to an exception during compilation. The exception message is: This collection already contains an address with scheme http. There can be at most one address per scheme in this collection.
Parameter name: item. ---> System.ArgumentException: This collection already contains an address with scheme http. There can be at most one address per scheme in this collection.