A second operating system accessing resources from an external service. A method includes sending an anonymized request, for an anonymized user corresponding to an authorized user, for resources, through a broker. A request for proof indicating that the anonymized user is authorized to obtain the resources is received from the broker. As a result, a request is send to a first operating system for the proof that the anonymized user is authorized to obtain the resources. Proof is received from the first operating system, based on the anonymized user being associated with the authorized user, that the anonymized user is authorized to obtain the resources. The proof is provided to the broker. As a result, the resources are obtained by the second operating system from the service.