Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....nge-web-services/how-to-authenticate-an-ews-application-by-using-oauth..."ClientId" , "ClientSecret" , "EMail" , "Password" , scopes ); //...