Methods and system of sharing information among network servers coupled to a data communication network for providing services to a user via a client on the network and data structure for use therewith. Related services provided by the network servers are grouped into service groups. A database stores user-specific information, including operational information to be shared within the service groups. A central server coupled to the network receives a request from the user for a selected service and determines whether the selected service belongs to one of the service groups. In response to the request, the central server retrieves user-specific information identifying the user with respect to the selected service. The retrieved information includes operational information to be shared within each of the service groups to which the selected service belongs.