The approaches described in the previous section made the implicit assumption that a user connecting to the global URL has an account in organizations present in each service location, and that the site selection process is free to choose from any site. Depending upon the Cloud Service Provider offering, this might not be the case. Customers might choose to take service in only some locations and not others. Providers might be constrained by capacity at some locations and be unable to onboard new customers to those sites. Whatever the reason, if a user logging in through the global URL is presented with the login page of a site in which their organization is not present, their login will fail. To avoid this situation, if the provider does not provide ubiquitous access, the simple global access model requires modification.