The OPTIONS command returned HTTP 200, but the Exchange ActiveSync header ({0}) wasn't returned. The request likely did not ...

The OPTIONS command returned HTTP 200, but the Exchange ActiveSync header ({0}) wasn't returned. The request likely did not reach a Client Access server, either because  - A proxy server intervened (check the headers below for any that may have been returned by a proxy)  -The virtual directory could not be reached: {1} - The virtual directory does not point to a Client Access server: {1}