Disclosed are a method and a system for accessing data by a client device in a distributed network system having a central server system, at least one client device, and at least one business object server. The client device and business object server are coupled to the central server system via a communication network. In the business object server, a number of business objects are stored. Each business object server includes a number of offices; each business object is assigned to an office in the respective business object server. The central server system receives an access request message, which includes at least one unique client identifier; the central server system determines at least one access authorization by means of the client identifier, and generates access instructions for the business objects, which the client device is allowed to access. The business objects are read and are transmitted to the client device.