In some embodiments, an activation object used to activate a software product is stored in a directory service. The activation object may, for example, comprise a proof of purchase token and/or information about the directory service, and may be communicated from the directory service to a client computer after the directory service authenticates a request from a client computer for access to the activation object. In some embodiments, a directory service is interrogated for an activation object used to activate software on a client computer. A client computer may, for example, receive an activation object from the interrogated directory service, and use the received activation to object to activate a software product on the client computer. In some embodiments, a non-transitory computer-readable medium has instructions stored thereon that, when executed by a computer, cause the computer to interrogate a directory service for an activation object used to activate software on the computer. The computer may, for example, receive the activation object from the directory service, and use the received activation object to activate a software product.