The invention relates to a method for distributing multimedia licenses (LIR, LIS) through a server to a plurality of devices in a distribution system of a protected-access multimedia service by first protection (KT1). This method aims to: - verify that the computation resources used by the server do not exceed a maximum threshold, and if they do, generate, then send regular licenses (LIR) including the first protection (KT1) in response to requests from the devices, and if not, switch the server to a singular mode consisting of: - protecting access to the multimedia service by second protection (KT2), independent of the first protection (KT1), - generating and sending to the devices a singular licence (LIS) including the second protection (KT2), - verifying that the computation resources do not exceed the maximum threshold, and if they do, switching from the singular mode to a regular mode so as to protect access to the multimedia service using only said first protection (KT1).