1. A computer-implemented method, comprising: at a client system having one or more processors and memory storing one or more programs executed by the one or more processors: concurrently displaying a set of hosted service identifiers for a domain name of a user account of a user of the client system, the set of concurrently displayed hosted service identifiers including: a first subset of service identifiers corresponding to services provided by a first service provider; and a second subset of service identifiers corresponding to services provided by a second service provider distinct from the first service provider; in accordance with a first determined scope of services provided by the first service provider, receiving one of the services provided by the first service provider in response to a user selection of one of the first subset of service identifiers, wherein the first determined scope of services is determined in accordance with the domain name of the user account of the user of the client system; and in accordance with a second determined scope of services provided by the second service provider, receiving one of the services provided by the second service provider in response to a user selection of one of the second subset of service identifiers, wherein the second determined scope of services is determined in accordance with the domain name of the user account of the user of the client system.