A Ruby client access library for Microsoft Exchange Web Services (EWS). Examples can be found here: http://distributed-frostbite.blogspot.com

The Autodiscover Service provides information about a Microsoft Exchange environment such as service URLs, versions and many other attributes.

Ruby library for accessing Microsoft Exchange using Exchange Web Services

Exchange RSA keys between Microsoft CSP blob format (ExportCspBlob, ImportCspBlob) and ruby openssl key OpenSSL::PKey::RSA