The disclosure generally relates to a system and method for managing distributed encrypted combination over-locks from a remote location. In an exemplary embodiment, the invention is a distributed management system for self-storage facilities that allow for vacant units to be secured with over-locks without requiring unlock codes, and which allow the over-locks to be removed by customers without human or manual intervention from the self-storage facility, where an API is used to facilitate communications between a lock management system and a property management system.