EWS Schema Versions – Why can’t I pick versions for 2007 SP2/SP3 or 2010 SP3?

I see confusion on how the EWS Schema Version (RequestServerVersion) is used from time to time.  So, I would like to clear up how its used. The EWS Schema Version is not the patch level of the Exchange server. Its something different – its the schema version of EWS that tells the server what the minimal…

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