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....such example could be adding the X-AnchorMailbox header that is used...); try { client . addHeader ( "X-AnchorMailbox" , "username@domain...