1. A method, comprising: maintaining, on an administrative server, a configuration store containing a plurality of entries associated with a plug-in, each entry of the plurality of entries associating the plug-in with a runtime state for that plug-in, the plurality of entries comprising: a plurality of instance entries corresponding to a plurality of access management servers, each instance entry associating a runtime state with an instance of the plug-in executing on a particular access management server; and a master entry for the plug-in, the master entry associating a most recent runtime state applicable to all of the instances of the plug-in executing on all of the plurality of access management servers; receiving, at the administrative server, a command to transition runtime states of each instance of a plug-in from a first runtime state to a second runtime state; in response to receiving the command, sending, from the administrative server to each of the plurality of access management servers, an instruction to transition a runtime state of a plug-in instance associated with that access management server from the first runtime state to the second runtime state; receiving, at the administrative server, from each of two or more access management servers of the plurality of access management servers, a reply indicating whether a plug-in instance successfully transitioned from the first runtime state to the second runtime state; determining whether replies indicating a successful transition from the first runtime state to the second runtime state have been received from all of the plurality of access management servers; and in response to a determination that replies indicating a successful transition from the first runtime state to the second runtime state have been received from all of the plurality of access management servers: updating the master entry for the plug-in; and clearing each of the plurality of instance entries for the plug-in, corresponding to each of the plurality of access management servers.