C++ with gsoap to read email from outlook using exchange web services

Hi,

how can we use C++ with gSOAP to fetch email data from outlook mail (in office 365) using exchange web services. Is there need to be authentication API of office 365, and if yes, then does this API support C++ language.

OR gSOAP is enough to read the data of email from exchange server of office 365. and in gSOAP is there need to be authentication, If yes then which one? please help me.