Can you confirm the version of Exchange server required that allows me to use "publicfoldersroot" as the distinguished folder id in a call to FindFolder? I have some code that works when I set RequestServerVersion to "Exchange2010_SP1" but not otherwise. (The error is http 500 "The request is valid but does not specify the correct server version in the RequestServerVersion SOAP header".) I have a customer whose server is saying EWS version "8" and for whom this does not work. He is complaining mightily and I just wanted to make sure there is no workaround or something I am doing wrong before I give up on getting it to work.
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