It is provided a method for enabling distribution of a mobile key for obtaining access to a physical space. The method is performed in a mobile key agent and comprises the steps of: receiving a booking signal from a booking agent, the booking signal being associated with a booking of physical space, wherein the booking signal comprises a property identifier, an allocation time, and a name of the user; obtaining a system booking reference associated with the booking of physical space; providing the system booking reference to the booking agent; establishing contact with the mobile key repository, yielding an identifier of the mobile key repository; receiving a space allocation message comprising an identifier of a physical space and the system booking reference; and transmitting a key allocation command to an electronic access control system associated with the property, the key allocation command comprising the identifier of the mobile key repository, the identifier of the physical space and the allocation time.