US Patent 10482219 License management server, license management system, and storage medium

When a license management server according to the present exemplary embodiment receives a request for changing a license of a first version to a license of a second version from a license operation server that leases a license to a client, the license management server changes an expiration date of the license of the first version to a predetermined period of time later, and issues the license of the second version. Then, the license of the first version of which expiration date has been changed to the predetermined period of time later and the issued license of the second version are transmitted to the license operation server.