Methods, computer systems, and computer readable media provide for network location overrides for a client to utilize when accessing network hosted services. A client computer obtains network locations for hosted services from a network location, such as a URL of a configuration server. Any overrides providing different network locations for one or more of the hosted services are obtained from a store of the client computer, such as from a system registry provided by the operating system. The network location of an override is then used in place of a network location specified at the configuration server to access the hosted service. The overrides may apply for all applications, certain applications, certain services of an application, or for certain users of the client computer.