Abstract: A method of managing authorizations to operate a software tool. The method comprises maintaining a count of available authorizations and an authorization allocation list that identifies what authorizations for executing the software tool are allocated to what computers by an authorization resource manager application executing on a computer system, for each of a plurality of computers, determining periodically by the authorization resource manager application if the computer is currently executing the software tool, for each computer determined to be executing the software tool, determining by the authorization resource manager application if an authorization for executing the software tool is allocated to the computer in the authorization allocation list, and, in response to determining that a computer is executing the software tool without being identified as being allocated an authorization in the authorization allocation list, invalidating an authorization identity being used by the computer.